Innovating in North Texas

Dr. Vira is one of the highest published spine surgeons in the DFW area.

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Journal Papers
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Advancing our profession

improving Clinical Efficacy

As Director of Spine Surgery Research, Dr. Vira oversees both randomized trials and retrospective studies at the university. He dedicates considerable time to collecting and analyzing data on the efficacy of spinal surgeries for one sole purpose: to progressively improve the care for his patients. Below is a list of the numerous contributions Dr. Vira has made in the fields of spine, orthopaedic surgery, and healthcare policy.

  1. Passias PG, Passfall L, Williamson T, Schoenfeld A, Owusu-Sarpong S, Dhillon E, Krol O, Kummer N, Tretiakov P, Imbo B, Joujon-Roche R, Moattari K, Lebovic J, Vira S, Diebo B, Smith JS, Park P, Mummaneni P, Shabani S, Chou D, Lafage R, Lafage V. The clinical impact of failing to achieve ideal proportional realignment in adult spinal deformity patients. Feb 2022. PMID 35125457.
  2. Passias PG, Moattari K, Pierce K, Passfall L, Krol O, Naessig S, Ahmad W, Schoenfeld A, Ahmad S, Singh V, Joujon-Roche R, Williamson T, Imbo B, Tretiakov P, Vira S, Diebo B, Lafage R, Lafage V. Performance of the modified adult spinal deformity frailty index (mASD-FI) in preoperative risk assessment. Feb 2022. PMID 35125455.
  3. Palmisciano P, Sagoo N, Haider A, Ogasawara C, Ogasawara M, Alamer O, Heidari K, Raj K, Scalia G, Umana G, Krishnaney A, Aoun S, Passias PG, Vira S. Primary paraganglioma of the spine: a systematic review of clinical features and surgical management in cauda equina vs non-cauda equina lesions. World Neurosurgery. Feb 2022. PMID 35123022.
  4. Passias PG, Pierce K, Krol O, Williamson T, Naessig S, Ahmad W, Passfall L, Tretiakov P, Imbo B, Joujon-Roche R, Lebovic J, Owusu-Sarpong S, Moattari K, Kummer N, Maglaras C, O’Connll B, Diebo B, Vira S, Lafage R, Lafage V, Buckland A, Protopsaltis T. Health-related quality of life measures in adult spinal deformity: can we replace the SRS-22 with PROMIS? European Spine Journal. Jan 2022. PMID 35013830.
  5. Pierce K, Kapadia B, Naessig S, Ahmad W, Vira S, Paulino C, Gerling M, Passias PG. Validation of the ACS – NSQIP risk calculator: a machine learning risk tool for predicting complications and mortality following adult spinal deformity corrective surgery. International Journal of Spine Surgery. Dec 2021. 16 (6): 1210-1216. PMID 35086879.
  6. Sagoo N, Haider AS, Ozair A, Vannabouathong C, Rahman M, Haider M, Sharma N, Raj K, Raj S, Paul JC, Steinmetz M, Adogwa O, Aoun S, Passias PG, Vira S. Percutaneous image-guided cryoablation of spinal metastases: a systematic review. Journal of Clinical Neuroscience. Nov 2021. PMID 34840092.
  7. Sagoo N, Haider A, Palmisciano P, Vannabouathong C, Gonzalez R, Chen A, Lokesh N, Sharma N, Larsen K, Singh R, Mulpuri N, Rezzadeh K, Caldwell C, Tappen L, Gill K, Vira S. Coccygectomy for refractory coccygodynia: a systematic review and meta-analysis. European Spine Journal. Oct 2021. PMID 34694498.
  8. Deme P, Perera A, Chilakapati S, Stutzman S, Singh R, Eldridge C, Caruso J, Vira S, Aoun S, Makris U, Bagley C, Adogwa A. Patient and spine surgeon perceptions on shared decision making in the treatment of older adults undergoing corrective surgery for adult spinal deformity. Oct 2021. PMID 34652306.
  9. Gottumukkala S, Srivastava U, Brocklehurst S, Mendel J, Kumar K, Yu F, Agarwal A, Shah B, Vira S, Raj K. Fundamentals of radiation oncology for treatment of vertebral metastases. Oct 2021. PMID 34623944.
  10. Al-Adli N, Akbik O, Rail B, Montgomery E, Caldwell C, Barrie U, Vira S, Al Tamimi M, Bagley C, Aoun S. The clinical use of serum biomarkers in traumatic brain injury: a systematic review stratified by injury severity. World Neurosurgery. Aug 2021. PMID 34438102.
  11. Wang C, Vira S, Stieber J. Osseous thoracic foraminal stenosis with unilateral congenital absence of T1 rib – a case report. Bulletin of the Hospital for Joint Diseases. 2021. 79 (3): 197-199. PMID 34605758.
  12. Pierce KE, Naessig S, Kummer N, Larsen K, Ahmad W, Passfall L, Krol O, Bortz C, Alas H, Brown A, Diebo B, Schoenfeld A, Raad M, Gerling M, Vira S, Passias PG. The five-item modified frailty index is predictive of 30-day postoperative complications in patients undergoing spine surgery. July 2021. 46 (14): 939-943. PMID 34160372.
  13. Sharma R, Sagoo NS, Haider AS, Sharma N, Haider M, Sharma IK, Igbinigie M, Aya KL, Aoun SG, Vira S. Iodine-125 radioactive seed brachytherapy as a treatment for spine and bone metastases: a systematic review and meta-analysis. Surgical Oncology. June 2021, PMID 34153905.
  14. Passias PG, Pierce K, Passfall L, Adenwalla A, Naessig S, Ahmad W, Krol O, Kummer N, O’Malley N, Maglaras C, O’Connell B, Vira S, Schwab F, Errico T, Diebo B, Janjua B, Raman T, Buckland A, Lafage R, Protopsaltis T, Lafage V. Not frail and elderly: how invasive can we go in this different type of adult spinal deformity patient? June 2021. PMID 34132235.
  15. Naessig S, Kapadia BH, Ahmad W, Pierce K, Vira S, Lafage R, Lafage V, Paulino C, Bell J, Hassanzadeh H, Gerling M, Protopsaltis T, Buckland A, Diebo B, Passias PG. Outcomes of same-day orthopedic surgery: are spine patients more likely to have optimal immediate recovery from outpatient procedures? International Journal of Spine Surgery. April 2021, 15 (2): 334-340. PMID 33900991.
  16. Srivatsa S, Vira S, Schils J, Shook S, Gill A, Krishnaney A. Reducing wrong level spinal surgeries through root cause analyses: a ten-year longitudinal analysis of a single tertiary institution’s iterative policy improvements. Dec 2020. PMID 33306612.
  17. Brown A, Lebovic J, Alas H, Pierce K, Bortz C, Ahmad W, Naessig S, Hassanzadeh H, Labaran L, Puvanesarajah V, Vasquez-Montes D, Wang E, Raman T, Diebo B, Vira S, Protopsaltis TS, Lafage V, Lafage R, Buckland A, Gerling M, Passias PG. A cost utility analysis of treating different adult spinal deformity frailty states. Journal of Clinical Neuroscience. Oct 2020, 80: 223-228. PMID 33099349.
  18. Naessig S, Kapadia BH, Para A, Ahmad W, Pierce K, Janjua MB, Vira S, Diebo B, Sciubba D, Passias PG. Timing to surgery of Chiari malformation type 1 affects complication types: an analysis of 13,812 patients. Journal of Craniovertebral Junction & Spine. July-Sept 2020, 11 (3): 232-236. PMID 33100774.
  19. Passias PG, Naessig S, Para A, Ahmad W, Pierce K, Janjua MB, Vira S, Sciubba D, Diebo B. Complication rates following Chiari malformation surgical management for Arnold-Chiari type 1 based on surgical variables: a national perspective. Journal of Craniovertebral Junction & Spine. July-Sept 2020; 11 (3): 169-172. PMID 33100765.
  20. Horn S, Moses M, Vasquez-Montes D, Hockley A, Poorman G, Bortz C, Segreto F, Brown A, Pierce K, Alas H, Ihejirika Y, Moon J, Varlotta C, Ge D, Vira S, Diebo B, De La Garza Ramos R, Lafage R, Lafage V, Sciubba D, Raad M, Nikas D, Passias P. Tethered cord syndrome in the United States: cluster analysis of presenting anomalies and associated diagnoses. Bulletin of the Hospital for Joint Diseases. Sept 2020, 78 (3): 157-162. PMID 32857021.
  21. Passias PG, Horn SR, Ihejirika YU, Vasques-Montes D, Segreto FA, Bortz CA, Brown AE, Pierce KE, Alas H, Poorman GW, Jalai CM, Wang C, Buza JA, Steinmetz L, Varlotta CG, Vira S, Diebo BG, Hassanzadeh H, Lafage R, Lafage V. Bariatric surgery population at significantly increased risk of spinal disorders and surgical intervention compared with morbidly obese patients. Clinical Spine Surgery. March 2020. PMID 32168118.
  22. Horn SR, Segreto FA, Alas H, Bortz C, Jackson-Fowl B, Brown A, Pierce KE, Vasquez-Montes D, Egers M, Line B, Oh C, Moon J, De la Garza Ramos R, Vira S, Diebo B, Frangella N, Stekas N, Shepard N, Horowitz J, Hassanzadeh H, Bendo J, Lafage R, Lafage V, Passias PG. Hospital-acquired conditions occur more frequently in elective spine surgery than for other common elective surgical procedures. Journal of Clinical Neuroscience, June 2020, 76: 36-40. PMID 32331939.
  23. Khan HA, Stumpf NJ, Isbester KA, Vira S, Steinmetz MP, Mroz TE. Anterior lumbar interbody fusion reduces thecal sac compression in the setting of degenerative spondylolisthesis. The Spine Journal. March 2020. 33 (4): E158-161. PMID 32145359.
  24. Vira S, Reddy N, Passias PG. Review of craniocervical sagittal alignment. Bulletin of the Hospital for Joint Diseases. 2020; 78 (1): 33-41. PMID 32144961.
  25. Bao H, Moal B, Vira S, Bronsard N, Amabile C, Errico T, Schwab F, Skalli W, Dubousset J, Lafage V. Spinofemoral muscles affect sagittal alignment and compensatory recruitment: a new look into soft tissues in adult spinal deformity. European Spine Journal. Dec 2020, 29 (12): 2998-3005. PMID 32529524.
  26. Enders J, Coughlin D, Mroz T, Vira S. Surface technologies for fusion. Neurosurgery Clinics, North America. Jan 2020, 31 (1): 57-64. PMID 31739930.
  27. Horn SR, Pierce KE, Oh C, Segreto FA, Egers M, Bortz C, Vasquez-Montes D, Lafage R, Lafage V, Vira S, Steinmetz L, Ge DH, Buza JA 3rd, Moon J, Diebo BG, Alas H, Brown AE, Shepard NA, Hassanzadeh H, Passias PG. Predictors of hospital-acquired conditions are predominately similar for spine surgery and other common elective surgical procedures, with some key exceptions. Global Spine Journal. Oct 2019, 9 (7): 717-723. PMID 31552152.
  28. Pierce KE, Horn SR, Jain D, Segreto FA, Bortz C, Vasquez-Montes D, Zhou PL, Moon J, Steinmetz L, Varlotta CG, Frangella NJ, Stekas N, Ge DH, Hockley A, Diebo BG, Vira S, Alas H, Brown AE, Lafage R, Lafage V, Schwab FJ, Koller H, Buckland AJ, Gerling MC, Passias PG. The impact of adult thoracolumbar spinal deformities on standing to sitting regional and segmental reciprocal alignment. International Journal of Spine Surgery. Aug 2019, 13 (4): 308-316. PMID 31531280.
  29. Horn SR, Shepard N, Poorman GW, Bortz CA, Segreto FA, Janjua MB, Diebo BG, Vira S, Passias P. National Trends in the prevalence, treatment, and associated spinal diagnoses among pediatric spondylolysis patients. Bulletin of the Hospital for Joint Diseases. Dec 2018, 76 (4): 246-251. PMID 31513509.
  30. Horn SR, Bortz CA, Ramachandran S, Poorman GW, Segreto F, Siow M, Sure A, Vasquez-Montes D, Diebo B, Tishelman J, Moon J, Zhou P, Beaubrun B, Vira S, Jalai C, Wang C, Shenoy K, Behery O, Errico T, Lafage V, Buckland A, Passias PG. Suboptimal age-adjusted lumbo-pelvic mismatch predicts negative cervical-thoracic compensation in obese patients. International Journal of Spine Surgery. June 2019, 13 (3): 252-261. PMID 31328089.
  31. Ramme AJ, Vira S, Hotca A, Miller R, Welbeck A, Honig S, Egol KA, Rajapakse CS, Chang G. A novel MRI tool for evaluating cortical bone thickness of the proximal femur. Bulletin of the Hospital for Joint Diseases. March 2019. 77 (2) 115-121. PMID 31128580.
  32. Passias PG, Segreto FA, Lafage R, Lafage V, Smith JS, Line BG, Scheer JK, Mundis GM, Hamilton DK, Kim HJ, Horn SR, Bortz CA, Diebo BG, Vira S, Gupta MC, Klineberg EO, Burton DC, Hart RA, Schwab FJ, Shaffrey CI, Ames CP, Bess S; ISSG. Recovery kinetics following spinal deformity correction: a comparison of isolated cervical, thoracolumbar, and combined deformity morphometries. Spine J. March 2019. PMID 30930292.
  33. Poorman GW, Segreto FA, Beaubrun BM, Jalai CM, Horn SR, Bortz CA, Diebo BG, Vira S, Bono OJ, Garza-Ramos D, Moon J, Wang C, Hirsch B, Tishelman J, Zhou P, Gerling M, Passias P. Traumatic fracture of the pediatric cervical spine: etiology, epidemiology, concurrent injuries, and an analysis of perioperative outcomes using the KID’s inpatient database. International Journal of Spine Surgery. 2019, 13(1): 68-78. PMID 30805288.
  34. Passias PG, Bortz C, Alas H, Segreto FA, Horn SR, Ihejirika YU, Vasquez-Montes D, Pierce KE, Brown AE, Shenoy K, DelSole EM, Johnson B, Oh C, Zhou PL, Deflorimonte C, Dhillon ES, Jankowski PP, Diebo BG, Lafage V, Lafage R, Vira S, Bendo JA, Goldstein JA, Schwab FJ, Gerling MC. Alcoholism as a predictor for pseudarthrosis in primary spine fusion: An analysis of risk factors and 30-day outcomes for 52,402 patients from 2005 to 2013. Journal of Orthopaedics. Dec 2018. 16 (1): 36-40. PMID 30662235.
  35. Segreto FA, Vasquez-Montes D, Bortz CA, Horn SR, Diebo BG, Vira S, Kelly JJ, Stekas N, Ge DH, Ihejirika YU, Lafage R, Lafage V, Karamitopoulos M, Delsole EM, Hockley A, Petrizzo AM, Buckland AJ, Errico TJ, Gerling MC, Passias PG. Impact of presenting patient characteristics on surgical complications and morbiditity in early onset scoliosis. Journal of Clinical Neuroscience. Jan 2019. PMID 30635164.
  36. Passias PG, Bortz CA, Pierce KE, Segreto FA, Horn SR, Vasquez-Montes D, Lafage V, Brown AE, Ihejirika Y, Alas H, Varlotta C, Ge DH, Shepard N, Oh C, DelSole EM, Jankowski PP, Hockley A, Diebo BG, Vira S, Sciubba DM, Raad M, Neuman BJ, Gerling MC. Decreased rates of 30-day perioperative complications following ASD-corrective surgery: a modified Clavien analysis of 3300 patients from 2010 to 2014. Journal of Clinical Neuroscience. Nov 2018. PMID 30424970.
  37. Passias PG, Horn SR, Vasquez-Montes D, Shepard N, Segreto FA, Bortz CA, Poorman GW, Jalai CM, Wang C, Stekas N, Frangella NJ, Deflorimonte C, Diebo BG, Raad M, Vira S, Horowitz JA, Sciubba DM, Hassanzadeh H, Lafage R, Afthinos J, Lafage V. Prior bariatric surgery lowers complication rates following spine surgery in obese patients. Acta Neurochir. Dec 2018. 160 (12):2459-2465. PMID 30406870.
  38. Segreto FA, Vasquez-Montes D, Brown AE, Bortz C, Horn SR, Diebo BG, Zhou PL, Vira S, Baker JF, Petrizzo AM, Lafage R, Lafage V, Errico TJ, Passias PG. Incidence, trends and associated risks of developmental hip dysplasia in patients with early onset and adolescent idiopathic scoliosis. Journal of Orthopaedics. Aug 2018; 15 (3): 874-877. PMID 30166802.
  39. Horn SR, Segreto FA, Ramchandran S, Poorman GR, Sure A, Marascalchi B, Bortz CA, Varlotta CG, Tishelman J, Vasquez-Montes D, Ihejirika Y, Zhou P, Moon J, Lafage R, Diebo BG, Vira S, Jalai CM, Wang C, Shenoy K, Errico T, Lafage V, Buckland A, Passias PG. The influence of body mass index on achieving age adjusted alignment goals in adult spinal deformity corrective surgery with full body analysis at 1 year. World Neurosurg. Aug 2018. 120:e533-e545. PMID 30165222.
  40. Passias PG, Poorman GW, Vasquez-Montes D, Jalai C, Horn SR, Steinmetz LM, Bortz CA, Segreto FA, Moon J, Zhou PL, Diebo BG, Vira S. Cluster analysis describes constellations of cardiac anomalies presenting in spinal anomaly patients. Acta Neurochir. June 2018. 160 (8): 1613-1619. PMID 29956035.
  41. Horn SR, Liu TC, Horowitz JA, Oh C, Bortz CA, Segreto FA, Vasquez-Montes D, Steinmetz LM, Deflorimonte C, Vira S, Diebo BG, Neuman BJ, Raad M, Sciubba DM, Lafage R, Lafage V, Hassanzadeh H, Passias PG. Clinical impact and economic burden of hospital-acquired conditions following common surgical procedures. May 2018. 43 (22): E1358-E1363. PMID 29794588.
  42. Horn SR, Dhillon ES, Poorman GW, Tischelman JC, Segreto FA, Bortz CA, Moon JY, Behery O, Shepard N, Diebo BG, Vira S, Passias PG. Epidemiology and national trends in prevalence and surgical management of metastatic spinal disease. Journal of Clinical Neuroscience. Apr 2018; PMID 29681425.
  43. Passias PG, Pyne A, Horn SR, Poorman GW, Janjua MB, Vasquez-Montes D, Bortz CA, Segreto FA, Frangella NJ, Siow MY, Sure A, Zhou PL, Moon JY, Diebo BG, Vira S. Developments in the treatment of Chiari type 1 malformations over the past decade. Journal of Spine Surgery. Mar 2018; 4(1):45-54. PMID 29732422.
  44. Paul J, Vira S, Quirno M, Protopsaltis T. Importance of the sagittal plane in understanding adult spinal deformities. Bulletin of the Hospital for Joint Diseases. Mar 2018, 76 (1): 80-84. PMID 29537961.
  45. Buckland A, DelSole E, George S, Vira S, Lafage V, Errico T, Vigdorchik J. Sagittal pelvic orientation: a comparison of two methods of measurement. Bulletin of the Hospital for Joint Diseases. Dec 2017; 75 (4): 234-240. PMID 29151007.
  46. Passias PG, Horn SR, Frangella NJ, Poorman GW, Vasquez-Montes D, Diebo BG, Bortz CA, Segreto FA, Moon JY, Zhou PL, Vira S, Sure A, Beaubrun B, Tishelman JC, Ramchandran S, Jalai CM, Bronson W, Wang C, Lafage V, Buckland AJ, Errico TJ. Full-body analysis of adult spinal deformity patients’ age-adjusted alignment at 1 year. World Neurosurgery. Mar 2018. PMID 29555609.
  47. Passias PG, Poorman GW, Segreto FA, Jalai CM, Horn SR, Bortz CA, Vasquez-Montes D, Diebo BG, Vira S, Bono OJ, De La Garza-Ramos R, Moon JY, Wang C, Hirsch BP, Zhou PL, Gerling M, Koller H, Lafage V. Traumatic fractures of the cervical spine: analysis of changes in incidence, etiology, concurrent injuries and complications among 488,262 patients from 2005-2013. World Neurosurgery. Nov 2017. PMID 29138069.
  48. Poorman G, Sure A, Jalai CM, Vira S, Horn SR, Diebo B, Bess S, Lafage V, Passias PG. Declining usage of BMP-2 in lumbar fusions for adult spinal deformity since 2008. Journal of Clinical Neuroscience. Oct 2017. PMID 29097133.
  49. Vira S, Husain Q, Jalai C, Paul J, Poorman C, Yoon RS, Looze C, Lonner B, Passias PG. The inter and intra-observer reliability of the Sanders classification versus the Risser stage. Journal of Pediatric Orthopaedics. Jun 2017, 37 (4): 246-249. PMID 27861212.
  50. Radcliff K, Jalai C, Vira S, Passias P, Yang S, Boniello AJ, Bianco K, Oh C, Gerling M, Poorman G, Buza JA, Isaacs RE, Vaccaro AR. Two-year results of the prospective spine treatment outcomes study: analysis of post-operative clinical outcomes between patients with and without a history of prior cervical spine surgery. World Neurosurg. Sept 2017. PMID 28962949.
  51. Passias PG, Poorman GW, Horn S, Jalai CM, Worley N, Yang S, Poorman CE, Buza J, Boniello A, Lee A, Vira S, Diebo B, Protopsaltis TS, Lafage V, Schwab F, Errico T. Bone marrow aspirate with concentration vs. iliac crest bone graft: 2-year results in a single-blinded randomized controlled trial on thoracolumbar spinal fusion bone grafts in multi-level adult spinal deformity. Spine [submitted]
  52. Wang C, Vira S, Stieber J. Unilateral congenital absence of a rib resulting in thoracic osseous foraminal stenosis and radiculopathy: a case report. Bulletin of the Hospital for Joint Diseases. [accepted]
  53. Jalai CM, Cruz DL, Diebo BG, Poorman G, Lafage R, Bess S, Ramchandran S, Day LM, Vira S, Liabaud B, Henry JK, Schwab FJ, Lafage V, Passias PG. Full-body analysis of age-adjusted alignment in adult spinal deformity patients and lower-limb compensation. Spine. May 2017, 42 (9): 653-661. PMID 27974739.
  54. Passias PG, Poorman GW, Delsole E, Zhou PL, Horn S, Jalai C, Vira S, Diebo B, Lafage V. Adverse outcomes and prediction of cardiopulmonary complications in elective spine surgery. Global Spine Journal. May 2018, 8 (3): 218-223. PMID 29796368.
  55. Lafage R, Liabaud B, Diebo BG, Oren JH, Gammal ID, Vira S, Spiegel MA, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Defining the role of the lower limbs in compensating for sagittal malalignment. 2017, Apr. PMID 28441279.
  56. Horn SR, Poorman GW, Tishelman JC, Moon J, Zhou PL, Vaynrub M, Vasquez-Montes D, Diebo BG, Vira S, Passias GW. Trends in treatment of Scheuermann’s kyphosis: a study of 1070 cases from 2003-2012. Spine Deformity. Jan 2019. 7(1): 100-106. PMID 31975255.
  57. Rana A, Vira S. Patient reported outcome measures in total joint arthroplasty. AAOS Instructional Course Lecture (ICL). 2017, 66: 647-652. PMID 28594534.
  58. Passias PG, Jalai CM, Lafage V, Poorman GW, Vira S, Horn SR, Scheer JK, Hamilton K, Line BG, Bess S, Schwab FJ, Ames CP, Burton DC, Hart RA, Klineberg EO, ISSG. Recovery kinetics of radiographic and implant-related revision patients following adult spinal deformity surgery. Neurosurgery. Oct 2017. PMID 29029213.
  59. Rajapakse CS, Honig S, Ramme AJ, Vira S, Hotca A, Newman BT, Kobe EA, Miller R, Chang G. Patient specific hip fracture strength assessment by microstructural MRI-based finite element modeling. Jun 2017, 283 (3): 854-861. PMID 27918708.
  60. Bono O, Poorman G, Foster N, Jalai C, Horn S, Oren J, Soroceanu A, Ramachandran S, Purvis T, Jain D, Vira S, Diebo B, Line B, Sciubba D, Protopsaltis T, Buckland A, Errico T, Lafage V, Bess S, Passias P. Body mass index predicts risk of complications in lumbar spine surgery based on surgical invasiveness. Spine Journal. Nov 2017. PMID 29155339.
  61. Poorman GW, Jalai CM, Diebo B, Vira S, Buza J, Tishelman J, Horn S, Bono O, Shenoy K, Hasan S, Paul J, Isaacs E, Kaye I, Atanda A, Buckland AJ, Lafage V, Errico T, Passias PG. Congenital etiology is an independent risk factor for complications in adolescents undergoing corrective scoliosis surgery: comparison of in-hospital co-morbidities using nationwide KID’s inpatient database. Journal of Pediatric Orthopaedics. Sept 2019, 39 (8): 406-410. PMID 31393299.
  62. Passias PG, Poorman GW, Jalai CM, Neuman B, Garza-Ramos R, Miller E, Jain A, Sciubba D, McClelland W, Day L, Ramachadran S, Isaacs E, Vira S, Diebo B, Bono O, Bess S, Gerling M, Lafage V. Morbidity of adult spinal deformity surgery in elderly has declined over time. Aug 2017, 42 (16):E978-E982. PMID 28059982.
  63. Jalai C, Diebo B, Cruz D, Poorman G, Vira S, Buckland A, Lafage R, Bess S, Schwab F, Errico T, Lafage V, Passias P. The impact of obesity on compensatory mechanisms in response to progressive sagittal malalignment. The Spine Journal. May 2017, 17 (5): 6810688. PMID 27916684.
  64. Ferrero E, Lafage R, Vira S, Rohan PY, Oren J, DelSole E, Guigui P, Schwab F, Lafage V, Skalli W. Three-dimensional reconstruction using stereoradiography for evaluating adult spinal deformity: a reproducibility study. European Spine Journal. 2016, PMID 27817139.
  65. Diebo B, Challier V, Henry JK, Oren JH, Spiegel MA, Vira S, Tanzi EM, Liabaud B, Lafage R, Protopsaltis TS, Erico TJ, Schwab FJ, Lafage V. Predicting cervical alignment required to maintain horizontal gaze based on global spinal alignment. Spine. Dec 2016, 41 (23): 1795-1800. PMID 271960
  66. Protopsaltis TS, Lafage R, Vira S, Sciubba DM, Soroceanu A, Hamilton KK, Smith J, Passias PG, Mundis G, Hart R, Schwab FJ, Klineberg E, Lafage V, Shaffrey C, Ames C. Novel angular measures of cervical deformity account for upper cervical compensation and sagittal alignment. Clinical Spine Surgery. 2017, Jun. PMID 28650879.
  67. Quirno M, Vira S, Errico TJ. Current evidence of minimally invasive spine surgery in the treatment of lumbar disc herniations. Bulletin of the Hospital for Joint Diseases. 2016, 74 (1): 88-97. PMID 26977554.
  68. Passias PG, Jalai CM, Worley N, Vira S, Scheer JK, Soroceanu A, Protopsaltis TS, Klineberg EO, Sciubba DM, Neuman B, Kim HJ, Hamilton DK, Smith JS, Lafage V, Ames C, ISSG. Development of new onset cervical deformity in non-operative ASD patients with 2-year follow-up. International Journal of Spine Surgery. December 2018. 12 (6): 725-734. PMID 30619677.
  69. Menga E, Speigel MA, Vira S, Lafage R, Henry JK, Liabaud B, Oren JH, Worley N, Schwab FJ, Errico TJ, Lafage V, Protopsaltis TS. Variability over time of preoperative sagittal alignment parameters: radiographic and clinical considerations. Spine. 2016. PMID 27120056.
  70. Jalai CM, Worley N, Marascalchi B, Challier V, Boniello A, Vira S, Lafage V, Bendo J, Passias P. The impact of advanced age on peri-operative outcomes in the surgical treatment of cervical spondylotic myelopathy: a nationwide study between 2001 and 2010. Spine. 2016, 41(3): 139-47. PMID 26866740
  71. Buckland AJ, Vira S, Oren JH, Lafage R, Harris BY, Spiegel MA, Diebo BG, Liabaud B, Protopsaltis TS, Schwab FJ, Lafage V, Errico TJ, Bendo JA. When does compensation for lumbar spinal stenosis become a clinical sagittal plane deformity? The Spine Journal. 2016, April. PMID 27063925.
  72. Spiegel MA, Lafage R, Lafage V, Ryan D, Marascalchi B, Trimba Y, Ames C, Harris B, Tanzi E, Oren J, Vira S, Errico T, Schwab F, Protopsaltis TS. Developing the total disability index based on an analysis of the interrelationships and limitations of ODI and NDI. Spine. 2016, 41 (1): 74-81. PMID 26335678
  73. Diebo BG, Oren JH, Challier V, Lafage R, Liu S, Vira S, Spiegel MA, Harris BY, Liabaud B, Henry JK, Errico TJ, Schwab FJ, Lafage L. Global Sagittal Axis (GSA): A step toward full body assessment of sagittal plane deformity in the human body. Journal of Neurosurgery: Spine. Oct 2016, 25 (4): 494-499. PMID 27203811.
  74. Passias P, Poorman G, Jalai C, Diebo B, Vira S, Horn S, Baker J, Shenoy K, Hasan S, Buza J, Bronson W, Paul J, Kaye D, Foster N, Cassilly RT, Oren JH, Moskovich R, Line B, Oh C, Bess S, Lafage V, Errico T. Incidence of congenital spinal abnormalities among pediatric patients and their association with scoliosis and systemic anomalies. Journal of Pediatric Orthopaedics. Sept 2019. 39 (8): e608-e613. PMID 31393300.
  75. Vira S, Diebo BG, Spiegel MA, Liabaud B, Henry JK, Oren JH, Lafage R, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Is there a gender specific recruitment pattern in the setting of progressive sagittal malalignment? Spine Deformity. 2016, 4 (2): 104-111. PMID 27927541.
  76. Vira S, Lafage V, Schwab FJ, Errico TJ. Promoting multidisciplinary collaboration: letter to the editor in response to “Academic Productivity and Contributions to the Literature among Spine Surgery Fellowship Faculty.” The Spine Journal. Oct 2015, 15 (10): 2297-2298. PMID 26303179.
  77. Passias PG, Jalai CM, Worley N, Vira S, Marascalchi B, McClelland S, Lafage V, Errico TJ. Adult spinal deformity: national trends in the presentation, treatment, and perioperative outcomes from 2003 to 2010. Spine Deformity. Sept 2017, 5(5): 342-350. PMID 28882352.
  78. Worley N, Marascalchi B, Jalai C, Yang S, Diebo B, Vira S, Boniello A, Lafage V, Passias P. Predictors of inpatient morbidity and mortality in adult spinal deformity surgery. European Spine Journal. PMID 26155895.
  79. Vira S, Ramme AJ, Chapman C, Xia D, Regatte RR, Chang G. Juvenile particulated osteochondral allografting for treatment of osteochondral lesions of the talus: detection of altered repair tissue biochemical composition using 7T MRI and T2 mapping. Journal of Foot and Ankle Surgery (JFAS). Jan-Feb 2017, 56 (1): 26-29. PMID 27989341.
  80. Worley N, Buza J, Jalai CM, Poorman GW, Day LM, Vira S, McClelland S, Lafage V, Passias PG. Diabetes as an independent predictor for extended length of hospital stay and increased adverse post-operative events in patients treated surgically for cervical spondylotic myelopathy. International Journal of Spine Surgery. Apr 2017. PMID 28765794.
  81. Lafage R, Challier V, Liabaud B, Vira S, Ferrero E, Diebo B, Liu S, Vital J, Mazda K, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Natural head posture in the setting of sagittal spinal deformity: validation of chin-brow vertical angle, slope of line of sight, and McGregor’s slope With health-related quality of life. Neurosurgery, July 2016, 79 (1): 108-15. PMID 26702836.
  82. Passias P, Jalai CM, Worley N, Vira S, Hasan S, White A, Gerling M, Lafage V, Errico TJ. Predictors for length of hospital stay and 30-day readmission in cervical spondylotic myelopathy patients: an analysis of 3057 patients using the American College of Surgeons database. World Neurosurgery. Nov 2017. PMID 29146432.
  83. Ravin R, Blank PS, Busse B, Ravin N, Vira S, Bezrukov L, Waters H, Guerrero-Cazares H, Quinones-Hinojosa A, Lee P, Fields DR, Bezrukov SM, Zimmerberg J. Blast shockwaves propagate Ca2+ activity via purinergic astrocyte networks in human central nervous system cells. Scientific Reports. 2016, 10 (6): 25713. PMID 27162174.
  84. Vira S, McCormack R, Felder GJ, Otsuka NY. Calcaneonavicular coalition with naviculocuneiform and cuneiform-first metatarsal coalitions: A Case Report. Bulletin of the Hospital for Joint Diseases. 2016, 74 (2), 165-7. PMID 27281323.
  85. Jalai CM, Worley N, Poorman GW, Cruz D, Vira S, Passias PG. Surgical site infections following operative management of cervical spondylotic myelopathy: prevalence, predictors of occurrence, and influence on peri-operative outcomes. European Spine Journal. 2016, 25 (6), 1891-6. PMID 26988555.
  86. Paul JC, Lonner BS, Vira S, Feldman D, Errico TJ. Does reoperation risk vary for different types of pediatric scoliosis? Journal of Pediatric Orthopaedics. Sept 2016, PMID 27603188.
  87. Paul JC, Lonner BS, Vira S, Kaye ID, Errico TJ. Use of recombinant morphogenetic protein is associated with reduced risk of reoperation after spine fusion for adult spinal deformity. Spine. Jan 2016, 41 (1):E15-21. PMID 26335682.
  88. Paul JC, Lonner BS, Vira S, Kaye ID, Errico TJ. Reoperation rates after long posterior spinal fusion: use of recombinant bone morphogenetic protein in idiopathic and non-idiopathic scoliosis. Spine Deformity. July 2016, 4 (4): 304-309. PMID 27927521.
  89. Paul JC, Lonner BS, Vira S, Errico TJ. High-volume hospitals and surgeons experience fewer early reoperation events after adolescent idiopathic scoliosis surgery. Spine Deformity. Sept 2015, 3 (5), 496-501. PMID 27927537.
  90. Ferrero E, Vira S, Ames CP, Kebaish K, Obeid I, O’Brien MF, Gupta MC, Boachie-Adjei O, Smith JS, Mundis GM, Challier V, Protopsaltis TS, Schwab FJ, Lafage V, ISSG. Analysis of an unexplored group of sagittal deformity patients: low pelvic tilt despite positive sagittal malalignment. European Spine Journal. Nov 2016, 25 (11): 3568-3576. PMID 26026474.
  91. Ferrero E, Liabaud B, Challier V, Lafage R, Diebo BG, Liu S, Vira S, Liu S, Vitale JM, Ilharreborde B, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Role of pelvic translation and lower-extremity compensation to maintain gravity line position in spinal deformity. Journal of Neurosurgery: Spine. Mar 2016, 24 (3): 436-56. PMID: 26565764.
  92. Ramme AJ, Guss M, Vira S, Vigdorchik J, Newe A, Raithel E, Chang G. Evaluation of automated volumetric cartilage quantification for hip preservation surgery. Journal of Arthroplasty. 2016, 31(1): 64-9. PMID 26377376.
  93. Vira S, Ramme AJ, Shakked R, McLaurin TM, Tejwani N. Two cases of retained cement after hip hemiarthroplasty: don’t forget the basics. Bulletin of the Hospital for Joint Diseases. 2015, 73 (4): 286-8.
  94. Ramme AJ, Vira S, Alaia MJ, Van de Leuv J, Rothberg RC. Exertional rhabdomyolysis after spinning. The Journal of Sports Medicine and Physical Fitness. 2016, 56 (6): 789-93. PMID 25665750.
  95. Vira S, Ramme AJ, Alaia MJ, Steiger D, Vigdorchik JM, Jaffe F. Duplex ultrasonography has limited utility in detection of postoperative DVT after primary total joint arthroplasty. Hospital for Special Surgery Journal. 2016, 12 (2), 132-6. PMID 27385941.
  96. Ramme AJ, Vira S, McLaurin TM. Super storm Sandy’s forgotten patient: a lesson in emergency preparedness in Severe Obesity. Obesity. 2015, 23 (2), 253-4. PMID 25627622.
  97. Lafage V, Schwab FJ; Vira S, Patel A, Ungar B, Farcy JP. Spino-pelvic parameters after surgery can be predicted: a preliminary formula and validation of standing alignment. Spine. 2011, 36 (13): 1037-45. PMID: 21217459
  98. Lafage V, Schwab FJ, Vira S, Hart R, Burton D, Boachie-Adjei O, Shelokov A, Hostin R, Shaffrey C, Gupta M, Akbarnia B, Bess S, Farcy JP. Does vertebral level of pedicle subtraction osteotomy correlate with degree of spino-pelvic parameter correction? Journal of Neurosurgery: Spine. 2011, 14 (2): 184-91. PMID: 21184642
  99. Vira S, Mekhedov E, Humphrey G, Zimmerberg J, Blank P. Fluorescent-labeled antibodies: balancing functionality and degree of labeling. Analytical Biochemistry. 2010, 402 (2): 146-150. PMID: 20362543
  100. Vira N; Vira S. Detection of a virtual passive pointer. International Journal of Image Processing, Computer Science Journals. 2009, 3 (2), 55-72.1.
  1. Passias PG, Krol O, Passfall L, Lafage V, Lafage R, Smith J, Line B, Vira S, Daniels A, Diebo B, Gum J, Schoenfeld A, Than K, Kim HJ, Hostin R, Gupta M, Eastlack R, Burton D, Schwab F, Shaffrey C, Klineberg E, Bess S, ISSG. Which components of the global alignment proportionality score have the greatest impact on outcomes in adult spinal deformity corrective surgery? 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  2. Krol O, Passfall L, Wousu-Sarpong S, Ahmad W, Williamson T, Imbo B, Joujon Roche R, Tretiakov P, Lebovic J, Diebo B, Vira S, Passias P. The influence of frailty on PJF – is optimal realignment superseded by physiologic age? 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  3. Passias PG, Passfall L, Tretiakov P, Lafage V, Lafage R, Line B, Vira S, Gum J, Kebaish K, Than K, Mundis G, Hostin R, Gupta M, Eastlack R, Schoenfeld A, Chou D, Daniels A, Protopsaltis T, Hamilton K, Soroceanu A, Pinteric R, Mummaneni P, Kelly M, Kim H, Anand N, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Smith J, Klineberg E, Bess S, ISSG. Have we made advancements in optimizing surgical outcomes and ameliorating recovery for high risk adult spinal deformity patients over time? 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  4. Passias P, Passfall L, Kummer N, Krol O, Imbo B, Joujon-Roche R, Tretiakov P, Williamson T, Moattari K, Diebo B, Vira S, Lafage V, Lafage R, Mummaneni P, Chou D, Park P, Shabani S. When does the construct need to extend to the thoracic spine in patients undergoing correction for cervical deformity? 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  5. Passias P, Krol O, Passfall L, Lafage V, Lafage R, Smith J, Line B, Vira S, Daniels A, Diebo B, Gum J, Schoenfeld A, Than K, Kim H, Hostin R, Gupta M, Eastlack R, Burton D, Schwab F, Shaffrey C, Klineberg E, Bess S, ISSG. Are we getting better at 3-column osteotomy in terms of achieving optimal realignment, minimizing complications, and clinical outcomes in adult spinal deformity? 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  6. Krol O, Passfall L, Owusu-Sarpong S, Ahmad W, Williamson T, Imbo B, Joujon-Roche R, Tretiakov P, Lebovic J, Vira S, Passias P. Determining the impact of proximal junctional kyphosis on cost-utility in adult spinal deformity patients. 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  7. Krol O, Passfall L, Owusu-Sarpong S, Ahmad W, Williamson T, Imbo B, Joujon-Roche R, Tretiakov P, Lebovic J, Vira S, Schoenfeld A, Lafage V, Lafage R, Park P, Chou D, Passias PG. Should corrective re-alignment goals be tailored to different frailty states? 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  8. Krol O, Passfall L, Owusu-Sarpong S, Ahmad W, Williamson T, Imbo B, Joujon-Roche R, Tretiakov P, Lebovic J, Vira S, Schoenfeld A, Lafage V, Lafage R, Park P, Chou D, Passias PG. Comparison of complications, outcomes, and cost in frail vs non-frail ASD surgery patients. 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  9. Passias P, Naessig S, Sagoo N, Passfall L, Ahmad W, Pierce K, Tretiakov P, Krol O, Joujon-Roche R, Williamson T, Imbo B, Lafage V, Vira S, Schoenfeld A, Protopsaltis T, Kim H, Daniels A, Hart R, Burton D, Klineberg E, Bess S, Schwab F, Shaffrey C, Ames C, Smith J, ISSG. Establishment of an individualized distal junctional kyphosis risk index taking into account radiographic, surgical and patient related components. 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  10. Passias P, Pierce K, Ahmad W, Passfall L, Kummer N, Krol O, Imbo B, Joujon-Roche R, Tretiakov P, Williamson T, Owusu-Sarpong S, Naessig S, Janjua MB, Lebovic J, Lafage R, Lafage V, Raman T, O’Connell B, Maglaras C, Protopsaltis T, Buckland A, Diebo B, Vira S, Lafage V, Lafage R, Mummaneni P, Chou D, Park P, Shabani S. Health related quality of life measures in adult spinal deformity: can we replace the SRS-22 with PROMIS? 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  11. Passias P, Ahmad W, Passfall L, Kummer N, Krol O, Imbo B, Joujon-Roche R, Tretiakov P, Williamson T, Segreto F, Owusu-Sarpong S, Naessig S, Janjua MB, Lebovic J, Schoenfeld A, Diebo B, Vira S, Lafage V, Lafage R, Mummaneni P, Chou D, Park P, Shabani S. Effect of osteoporosis and bisphosphonate on reoperations in adult spinal deformity. 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  12. Passias P, Pierce K, Ahmad W, Krol O, Imbo B, Joujon-Roche R, Tretiakov P, Williamson T, Naessig S, Schoenfeld A, Diebo B, Vira S, Mummaneni P, Chou D. Development and validation of the regional alignment and proportion (RAP) score in operative cervical deformity patients. 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  13. Passias P, Kummer N, Krol O, imbo B, Joujon-Roche R, Tretiakov P, Williamson T, Lafage V, Lafage R, Naessig S, Schoenfeld A, Diebo B, Vira S, Mummaneni P, Chou D. Identification of optimal frailty and deformity ranges at presentation to achieve maximum improvement from adult deformity corrective surgery. 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  14. Passias P ,Williamson T, Krol O, imbo B, Joujon-Roche R, Tretiakov P, Owusu-Sarpong S, Lebovic J, Lafage V, Lafage R, Schoenfeld A, Shabani S, Park P, Diebo B, Vira S, Mummaneni P, Chou D. Optimal realignment outweighs increased perioperative risk in ASD surgery. 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  15. Passias P, Joujon-Roche R, Krol O, Imbo B, Tretiakov P, Passfall L, Williamson T, Lafage V, Lafage R, Owusu-Sarpong S, Lebovic J, Schoenfeld A, Diebo B, Vira S, Mummaneni P, Chou D. Natural history of adult spinal deformity: how to patients with less than optimal surgical outcomes fare relative to non-operative counterparts? 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  16. Passias P, Imbo B, Joujon-Roche R, Krol O, Tretiakov P, Passfall L, Williamson T, Lafage V, Lafage R, Owusu-Sarpong S, Lebovic J, Schoenfeld A, Diebo B, Vira S, Park P, Mummaneni P, Chou D. Indications for combined anterior-posterior approach in cervical deformity surgery: patients who benefit from an additional anterior approach? 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  17. Passias P, Imbo B, Joujon-Roche R, Krol O, Tretiakov P, Passfall L, Williamson T, Owusu-Sarpong S, Diebo B, Vira S. Psychological distress in patients undergoing cervical spine surgery: 2-year outcomes of a randomized controlled trial. 29th International Meeting on Advanced Spine Techniques (IMAST). Miami, FL, April 6-9, 2022.
  18. Passias P, Krol O, Tretiakov P, Williamson T, Imbo B, Joujon-Roche R, Vira S, Diebo B, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Janjua B, Schoenfeld A, Smith J. What degree of coronal correction is needed in adult spinal deformity pateints to reduce radiographic complications in patients with ideal post-operative sagittal alignment? 15th Annual Meeting of the Lumbar Spine Research Society. Chicago, IL April 7-8, 2022.
  19. Passias P, Krol O, Tretiakov P, Joujon-Roche R, Imbo B, Williamson T, Vira S, Diebo B, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Janjua B, Schoenfeld A, Smith J. Prophylaxis usage can mitigate the effects of radiographic complications in patients who maintained a poor post-operative alignment. 15th Annual Meeting of the Lumbar Spine Research Society. Chicago, IL April 7-8, 2022.
  20. Passias P, Williamson T, Joujon-Roche R, Imbo B, Krol O, Schoenfeld A, Tretiakov P, Vira S, Diebo B, Smith J, Lafage R, Lafage V. Comparison of harmonious versus localized correction in adult spinal deformity surgery. 15th Annual Meeting of the Lumbar Spine Research Society. Chicago, IL April 7-8, 2022.
  21. Passias P, Williamson T, Imbo B, Tretiakov P, Joujon-Roche R, Krol O, Vira S, Schoenfeld A, Diebo B, Smith J, Lafage R, Lafage V. Determining the utility of 3-column osteotomies in revisions compared to primary surgeries. 15th Annual Meeting of the Lumbar Spine Research Society. Chicago, IL April 7-8, 2022.
  22. Kenfack Y, Neeley O, Kafka B, Tecle N, Shi C, Ahmadieh T, Barrie U, Sagoo N, Davies M, Johnson Z, Caruso J, Hoeft J, Stutzman S, Vira S, Batjer H, Whitworth L, Bagley C, Aoun S. Percutaneous screw fixation versus open fusion for the treatment of traumatic thoracolumbar fractures: a retrospective case series of 185 patients with a single-level spinal column injury. Global Spine Congress Annual Scientific Meeting. Las Vegas, NV, June 1-4, 2022.
  23. Palmisciano P, Sagoo NS, Haider AS, Ogasawara C, Ogasawara M, Bin Alamer O, Heidari KS, Scalia G, Umana GE, Krishnaney A, Aoun S, Passias PG, Vira S. Paraganglioma of the spine: a systematic review. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  24. Passias PG, Krol O, Lebovic J, Passfall L, Joujon-Roche R, Williamson T, Imbo B, Tretiakov P, Diebo B, Vira S, Schoenfeld A. The effect of distal junctional kyphosis on cost-utility of cervical deformity surgery. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  25. Passias PG, Williamson T, Imbo B, Krol O, Joujon-Roche R, Tretiakov P, Moattari K, Owusu-Sarpong S, Lebovic J, Diebo B, Vira S, Lafage R, Lafage V, Chou D, Shabani S, Mummaneni P, Park P, Janjua MB. Comparison of multi-level low-grade versus three-column osteotomies in adult spinal deformity surgery. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  26. Passias PG, Krol O, Lafage V, Lafage R, Smith J, Line B, Vira S, Daniels A, Diebo B, Gum J, Kebaish K, Park P, Mundis G, Hostin R, Gupta M, Eastlack R, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Klineberg E, Bess S, ISSG. The clinical benefit of addressing the malalignment in revision surgery for PJK following ASD surgery. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  27. Passias PG, Imbo B, Krol O, Joujon-Roche R, Tretiakov P, Passfall L, Williamson T, Vira S, Diebo B, Wousu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Janjua MB. Is it possible to recover from DJK relative to patients without DJK following ACD corrective surgery. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  28. Passias PG, Tretiakov P, Joujon-Roche R, Williamson T, Krol O, Passfall L, Kummer N, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Janjua M, Smith J. Assessing the incremental benefit of minimally invasive surgery for frail adult spinal deformity patients. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  29. Passias PG, Joujon-Roche R, Tretiakov P, Imbo B, Krol O, Williamson T, Diebo B, Vira S, Schoenfeld A, Janjua M, Lebovic J, Owusu-Sarpong S, Park P, Chou D, Mummaneni P. Surgical management of adult cervical deformity: are we getting better at optimal realignment? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  30. Passias PG, Ahmad W, Williamson T, Lebovic J, Krol O, Lafage R, Lafage V, Kebaish K, Kelly M, Gum J, Line B, Hart R, Burton D, Smith J, Ames C, Klineberg E, Daniels A, Schoenfeld A, Than K, Park P, Shaffrey C, Schwab F, Hostin R, Vira S, Bess S, ISSG. Cost-utility analysis of a combined approach for surgical correction of adult spinal deformity. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  31. Passias PG, Imbo B, Tretiakov P, Joujon-Roche R, Krol O, Williamson T, Passfall L, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Janjua M. Adult cervical deformity corrective surgery outcomes based on radiographic severity. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  32. Passias PG, Krol O, Joujon-Roche R, Imbo B, Tretiakov P, Williamson T, Lebovic J, Schoenfeld A, Vira S, Chou D, Park P, Mummaneni P. Diminishment of distal junctional kyphosis after cervical deformity corrective surgery by radiographic improvement. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  33. Passias PG, Kummer N, Passfall L, Krol O, Joujon-Roche R, Imbo B, Tretiakov P, Williamson T, Schoenfeld A, Diebo B, Vira S. Preoperative frailty and deformity ranges predictive of optimal outcomes in adult spinal deformity. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  34. Passias PG, Joujon-Roche R, Krol O, Tretiakov P, Imbo B, Williamson T, Diebo B, Vira S, Schoenfeld A, Janjua MB. Natural history of ASD: how do those with suboptimal surgical outcomes fare relative to non-operative counterparts? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  35. Passias PG, Tretiakov P, Williamson T, Joujon-Roche R, Imbo B, Krol O, Kummer N, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Schoenfeld A, Janjua M, Smith J. Psychological distress in patients undergoing cervical spine surgery: 2-year outcomes of a randomized controlled trial. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  36. Passias PG, Joujon-Roche R, Krol O, Tretiakov P, Imbo B, Williamson T, Diebo B, Vira S, Janjua MB, Schoenfeld A. Impact of realignment systems on rates of PJK in surgical correction of adult spinal deformity. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  37. Passias PG, Passfall L, Tretiakov P, Lafage V, Smith J, Lafage R, Line B, Diebo B, Daniels A, Protopsaltis T, Vira S, Klineberg E, Hoston R, Eastlack R, Mundis G, Kebaish K, Gum J, Uribe J, Hart R, Burton D, Ames C, Shaffrey C, Bess S, Gupta M, Schwab F, ISSG. Should length of construct influence our alignment goals in adult spinal deformity corrective surgery? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  38. Passias PG, Passfall L, Kummer N, Krol O, Tretiakov P, Joujon-Roche R, Imbo B, Williamson T, Vira S, Lebovic J, Schoenfeld A, Owusu-Sarpong S, Diebo B, Chou D, Lafage R, Mummaneni P, Park P, Shabani S, Janjua M, Smith J, Lafage V. Achievement of optimal alignment and improvement following cervical deformity surgery: a 2-year outcome analysis. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  39. Passias P, Joujon-Roche R, Kummer N, Lafage R, Vira S, Lafage V, Kim HJ, Daniels A, Mundis G, Eastlack R, Soroceanu A, Scheer J, Hamilton DK, Klineberg E, Line B, Schoenfeld A, Hart R, Burton D, Schwab F, Shaffrey C, Bess S, Smith J, Ames C. Improvements in cost effectiveness of adult cervical deformity corrective surgery over time. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  40. Passias P, Williamson T, Imbo B, Joujon-Roche R, Krol O, Tretiakov P, Moattari K, Lebovic J, Owusu-Sarpong S, Vira S, Diebo B, Lafage R, Lafage V, Mummaneni P, Chou D, Park P, Shabani S, Smith S. Development of the adult spinal deformity-specific surgical risk calculator. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  41. Passias PG, Joujon-Roche R, Imbo B, Tretiakov P, Williamson T, Krol O, Janjua M, Lebovic J, Owusu-Sarpong S, Schoenfeld A, Diebo B, Vira S, Park P. Sweet spot: can baseline disability predict outcomes in adult spinal deformity surgery? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  42. Passias PG, Kummer N, Passfall L, Krol O, Tretiakov P, Joujon-Roche R, Imbo B, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Mummaneni P, Park P, Shabani S, Schoenfeld A, Janjua M, Smith J. Development of a novel prognostic metric for post-corrective spinal surgery care requirements by diagnosis. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  43. Passias PG, Pierce K, Williamson T, Kummer N, Sagoo N, Krol O, Passfall L, Tretiakov P, Imbo B, Moattari K, Joujon-Roche R, Naessig S, Ahmad W, Schoenfeld A, Diebo B, Lafage V, Lafage R, Park P, Chou D, Shabani S, Smith J, Vira S. Severe baseline global alignment and proportion may require more aggressive alignment goals for lumbopelvic mismatch. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  44. Passias P, Naessig S, Patel K, Ahmad W, Pierce K, Tretiakov P, Williamson T, Joujon-Roche R, Imbo B, Krol O, Passfall L, Kummer N, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Paprk P, Shabani S, Janjua M, Smith J. Concurrent presence of thoracolumbar scoliosis and Chiari malformation: is operative risk magnified? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  45. Passias PG, Passfall L, Tretiakov P, Joujon-Roche R, Imbo B, Williamson T, Krol O, Kummer N, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Schoenfeld A, Janjua M, Smith J. Idea lcervical spine realignment in cervical deformity patients when the thoracolumbar spine is not addressed? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  46. Passias PG, Imbo B, Williamson T, Joujon-Roche R, Krol O, Tretiakov P, Passfall L, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Janjua M. Who benefits from a combined anterior-posterior approach in cervical deformity surgery? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  47. Passias PG, Krol O, Williamson T, Tretiakov P, Joujon-Roche R, Lebovic J, Imbo B, Schoenfeld A, Vira S, Chou D, Park P. Are we getting better with alignment over time? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  48. Passias PG, Passfall L, Joujon-Roche R, Krol O, Kummer N, Imbo B, Tretiakov P, Williamson T, Diebo B, Schoenfeld A, Vira S, Lebovic J, Owusu-Sarpong S, Smith J, Mummaneni P, Chou D, Park P, Lafage R, Lafage V. Three column osteotomy: predicting improved outcomes and minimizing risk in adult spinal deformity corrections. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  49. Passias PG, Krol O, Lafage V, Lafage R, Smith J, Line B, Vira S, Daniels A, Diebo B, Schoenfeld A, Gum J, Kebaish K, Park P, Mundis G, Hostin R, Gupta M, Eastlack R, Anand A, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Klineberg E, Bess S. Radiographic malaignment has a greater impact on outcomes than complications in ASD surgery. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  50. Passias PG, Passfall L, Tretiakov P, Lafage V, Lafage R, Line B, Vira S, Gum J, Kebaish K, Than K, Mundis G, Hostin R, Gupta M, Eastlack R, Schoenfeld A, Chou D, Daniels A, Protopsaltis T, Hamilton DK, Soroceanu A, Mummaneni P, Kelly M, Kim HJ, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Smith J, Klineberg E, Bess S, ISSG. Have we made advancements in optimizing surgical outcomes for high risk adult spinal deformity patients over time? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  51. Passias PG, Williamson T, Joujon-Roche R, Krol O, Tretiakov P, Passfall L, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Janjua MB, Smith J. Durability of alignment in the sagittal age-adjusted score following surgical adult spinal deformity correction. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  52. Passias PG, Krol O, Maottari K, Lafage V, Lafage R, Kim HJ, Daniels A, Diebo B, Protpsaltis T, Kebaish K, Soroceanu A, Scheer J, Hamilton DK, Klineberg E, Schoenfeld A, Vira S, Lilne B, Hart R, Burton D, Schwab F, Shaffrey C, Bess S, Smith J, Ames C, ISSG. Evolution of ACDF surgery clinical and radiographic outcomes: are behaviors and outcomes changing with experience? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  53. Passias PG, Krol O, Joujon-Roche R, Passfall L, Kummer N, Williamson T, Imbo B, Tretiakov P, Diebo B, Vira S, Schoenfeld A, Janjua MB. Which outcome measures are most sensitive to reralignment after adult spinal deformity surgery? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  54. Passias PG, Joujon-Roche R, Imbo B, Tretiakov P, Williamson T, Krol O, Diebo B, Vira S, Schoenfeld A, Lebovic J, Owusu-Sarpong S, Janjua MB. How do alignment criteria impact cost effectiveness of surgical intervention for adult spinal deformity? Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  55. Passias PG, Kummer N, Tretiakov P, Krol O, Passfall L, Williamson T, Joujon-Roche R, Imbo B, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Schoenfeld A, Shabani S, Janjua MB, Smith J. Risk of adult spinal deformity surgery can equal or exceed that of surgery for metastatic spinal disease. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  56. Passias PG, Tretiakov P, Joujon-Roche R, Imbo B, Williamson T, Krol O, Passfall L, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Janjua MB. Impact of addressing thoracic secondary drivers at onset of corrective surgery for adult cervical deformities. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  57. Passias PG, Imbo B, Williamson T, Joujon-Roche R, Krol O, Tretiakov P, Passfall L, Vira S, Diebo B, Owusu-Sarpong S, Lebovic J, Lafage R, Lafage V, Chou D, Mummaneni P, Park P, Shabani S, Janjua MB, Kummer N, Smith J. Trends in 5 year outcomes of a prospective consecutively enrolled single-center adult spinal deformity series. Congress of Neurological Surgeons Spine Summit 2022 – 38th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, Feb 23-26, 2022.
  58. Passfall L, Krol O, Kummer N, Sagoo N, Kapadia B, Diebo B, Vira S, Passias PG. Trends in 2 year outcomes of a prospective consecutively enrolled single-center adult cervical deformity series: optimal realignment correlates with superior outcomes. Cervical Spine Research Society (CSRS) 49th Annual Meeting, Atlanta, GA, Dec 1-4, 2021.
  59. Passias PG, Passfall L, Krol O, Kummer N, Kapadia B, Vira S, Lafage R, Diebo B, Lafage V. When does the construct need to extend to the thoracic spine in patients undergoing correction for cervical deformity? Cervical Spine Research Society (CSRS) 49th Annual Meeting, Atlanta, GA, Dec 1-4, 2021.
  60. Passfall L, Krol O, Kummer N, Kapadia B, Vira S, Diebo B, Passias PG. What is the ideal cervical spine realignment in operative cervical deformity patients when the thoracolumbar spine is not addressed? Cervical Spine Research Society (CSRS) 49th Annual Meeting, Atlanta, GA, Dec 1-4, 2021.
  61. Passias PG, Passfall L, Krol O, Kummer N, Sagoo N, Vira S, Lafage R, Diebo B, Lafage V. Delineation of alignment goals for adult cervical deformity correction that are associated with achievement of both optimal clinical and functional outcomes. Cervical Spine Research Society (CSRS) 49th Annual Meeting, Atlanta, GA, Dec 1-4, 2021.
  62. Kummer N, Passfall L, Krol O, Naessig S, Kapadia B, Vira S, Passias PG. Influence of staged vs same day surgical approach on cervical deformity corrective surgery cost effectiveness. Cervical Spine Research Society (CSRS) 49th Annual Meeting, Atlanta, GA, Dec 1-4, 2021.
  63. Kummer N, Passfall L, Krol O, Vira S, Kapadia B, Lafage V, Lafage R, Diebo B, Passias PG. Diminishment of distal junctional kyphosis rates among surgically corrected cervicala deformity patients over time. Cervical Spine Research Society (CSRS) 49th Annual Meeting, Atlanta, GA, Dec 1-4, 2021.
  64. Kummer N, Krol O, Passfall L, Lafage R, Lafage V, Vira S, Passias PG. Treatment of severe adult cervical deformities classified by radiographic criteria is associated with inherent risk. Cervical Spine Research Society (CSRS) 49th Annual Meeting, Atlanta, GA, Dec 1-4, 2021.
  65. Mulpuri N, Reddy N, Larsen K, Patel A, Diebo B, Passias P, Tappen L, Gill K, Vira S. Clinical outcomes of coccygectomy for coccydynia: a single institution series with mean 5-year follow-up. Global Spine Congress 2021, Paris, France, Nov 3-6, 2021.
  66. Sagoo N, Haider A, Ozair A, Rahman M, Haider M, Sharma N, Paul J, Steinmetz M, Adogwa O, Aoun S, Passias P, Vira S. Iodine-125 radioactive seed brachytherapy as a treatment for spine and bone metastases: as systematic review and meta-analysis. American College of Surgeons Clinical Congress, virtual meeting, October 24-28, 2021.
  67. Sagoo NS, Gonzalez R, Lokesh N, Vannabouathong C, Haider AS, Larsen K, Sharma N, Singh R, Tappen L, Gill K, Vira S. Coccygectomy for refractory coccygodynia: a systematic review and meta-analysis. Congress of Neurological Surgeons (CNS) Annual Meeting, Austin, TX, Oct 16-20, 2021.
  68. Sagoo NS, Larsen K, Singh R, Lokesh N, Badejo O, Gonzalez R, Reddy N, Adenwalla A, Igbinigie M, Aoun SG, Dickson D, Van Hal M, Gill K, Vira S. Single versus mutli-level anterior cervical discectomy and fusion with a zero-profile stand-alone implant: comparing patient-reported outcomes. Congress of Neurological Surgeons (CNS) Annual Meeting, Austin, TX, Oct 16-20, 2021.
  69. Sagoo NS, Larsen K, Chen AL, Haider AS, Sharma N, Gonzalez R, Wells DB, Aoun SG, Passias PG, Vira S. Radiofrequency ablation for spinal osteoid osteoma: a systematic review of treatment outcomes. 2021 American Association of Neurological Surgeons / Congress of Neurological Surgeons Tumor Section Symposium, Austin, TX, Oct 15-16, 2021.
  70. Al-Adli N, Akbik OS, Rail B, Montgomery E, Caldwell C, Barrie U, Vira S, Al Tamimi M, Bagley CA, Aoun SG. The clinical use of serum biomarkers in traumatic brain injury: a systematic review stratified by injury severity. Congress of Neurological Surgeons (CNS) Annual Meeting, Austin, TX, Oct 16-20, 2021.
  71. Passias PG, Krol O, Moattari K, Singh V, Fiedler B, Vira S, Sagoo NS, Passfall L, Ahmad W, Kummer N, Tretiakov PS, Joujon-Roche R, Williamson T, Imbo B, Schoenfeld A, De la Garza Ramos R, Janjua M, Sciubba D, Diebo B, Paulino C. Comparison of complications, outcomes, and cost in frail vs non-frail adult spinal deformity patients. Congress of Neurological Surgeons (CNS) Annual Meeting, Austin, TX, Oct 16-20, 2021.
  72. Krol O, Passias PG, Lafage V, Lafage R, Smith JS, Line B, Diebo B, Daniels A, Protopsaltis TS, Vira S, Klineberg E, Hostin R, Eastlack R, Mundis G, Kebaish K, Gum J, Yagi M, Hart R, Burton D, Ames C, Shaffrey C, Bess S, Gupta M, Schwab F, ISSG. Which components of the global alignment proportionality score have the greatest impact on outcomes in adult spinal deformity corrective surgery? 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  73. Krol O, Passias PG, Lafage V, Lafage R, Smith J, Line B, Vira S, Daniels A, Diebo B, Gum J, Kebaish K, Park P, Mundis G, Hostin R, Gupta M, Eastlack R, Anand N, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Klineberg E, Bess S, ISSG. Radiographic malalignment has a far greater impact on clinical outcomes than perioperative and postoperative complications in ASD surgery. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  74. Passias PG, Krol O, Lafage V, Lafage R, Smith J, Line B, Lipa S, Protopsaltis TS, Daniels A, Diebo B, Vira S, Eastlack R, Mundis G, Hostin R, Gupta M, Anand N, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Klineberg E, Kim H, Bess S, ISSG. The clinical benefit of addressing the malalignment in revision surgery for proximal junctional kyphosis following ASD surgery. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  75. Passias PG, Krol O, Lafage V, Lafage R, Smith J, Line B, Vira S, Daniels A, Diebo B, Gum J, Kebaish K, Than K, Kim H, Hostin R, Gupta M, Eastlack R, Anand N, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Klineberg E, Bess S, ISSG. Are we getting better at 3 column osteotomy in terms of achieving optimal realignment and minimizing complications in adult spinal deformity surgery? 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  76. Naessig S, Ahmad W, Pierce K, Kummer N, Krol O, Passfall L, Janjua M, Vira S, Diebo B, Sciubba D, Passias PG. Complication rates following Chiari malformation surgical management based on sub type and surgical variables. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  77. Naessig S, Ahmad W, Pierce K, Krol O, Kummer N, Passfall L, Vira S, Diebo B, Passias PG. Central cord syndrome – should age influence surgical decision and timing. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  78. Kroll O, Passias PG, Passfall L, Kummer N, Pierce K, Ahmad W, Naessig S, Vira S, O’Connell B, Maglaras C, Paulino C, De la Garza Ramos R, Lafage R, Schoenfeld A, Buckland A, Protopsaltis TS, Lafage V. Comparison of complications, outcomes, and cost in frail vs non frail adult spinal deformity surgery patients. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  79. Kummer N, Passfall L, Krol O, Naessig S, O’Connell B, Maglaras C, Ahmad W, Pierce K, Kapadia B, Vira S, Diebo B, Schoenfeld A, Passias PG. Relation of disability index and the patient-reported outcomes measurement information system better isolates high risk adult spinal deformity patients. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  80. Passias PG, Kummer N, Krol O, Passfall L, Ahmad W, Naessig S, Pierce K, Patel K, Janjua M, Vira S, Sagoo N, Kapadia B, Schoenfeld A, O’Connell B, Maglaras C, Paulino C, Sciubba D, De la Garza Ramos, R, Lafage R, Buckland A, Protopsaltis TS, Lafage V. Highest achievable outcomes for adult spinal deformity corrective surgery by frailty. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  81. Passias PG, Krol O, Passfall L, Kummer N, Pierce K, Ahmad W, Naessig S, Vira S, Kapadia B, OConnell B, Maglaras C, Paulino C, De la Garza Ramos R, Lafage R, Schoenfeld A, Buckland A, Protopsaltis TS, Diebo B, Lafage V. Determining the impact of proximal junctional kyphosis on cost utility in adult spinal deformity patients. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  82. Passias PG, Kummer N, Passfall L, Krol O, Kapadia B, Diebo B, Vira S, Lafage V. Identification of optimal frailty and deformity ranges to achieve maximum improvement from adult spinal deformity corrective surgery. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  83. Passfall L, Krol O, Kummer N, Naessig S, Pierce K, Ahmad W, Saleh H, Vira S, Kapadia B, Diebo B, Passias PG. Psychological distress in patients undergoing cervical spine surgery: 2-year outcomes of a randomized controlled trial. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  84. Passias PG, Krol O, Kummer N, Pierce K, Ahmad W, Naessig S, O’Connell B, Vira S, Kapadia B, Maglaras C, Janjua M, Paulino C, Sciubba D, De la Garza Ramos R, Lafage R, Schoenfeld A, Protopsaltis TS, Diebo B, Lafage V. The effects of global alignment and proportionality scores on postoperative outcomes following adult spinal deformity correction. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  85. Passias PG, Krol O, Passfall L, Kummer N, Pierce K, Ahmad W, Naessig S, Vira S, O’Connell B, Maglaras C, Paulino C, Sciubba D, Lafage R, Protopsaltis TS, Diebo B, Lafage V. Should our corrective re-alignments be tailored to different frailty states? 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  86. Kummer N, Krol O, Passfall L, Ahmad W, Naessig S, Pierce K, Patel K, Vira S, Kapadia B, Diebo B, Janjua M, Schoenfeld A, O’Connell B, Maglaras C, Paulino C, Sciubba D, de la Garza Ramos R, Lafage R, Buckland A, Protopsalits TS, Lafage V, Passias PG. Determinants of cost-ineffectiveness in adult spinal deformity surgery. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  87. Krol O, Kummer N, Passfall L, Ahmad W, Pierce K, Naessig S, Vira S, Kapadia B, Zavodovsky V, Lafage R, Lafage V, Diebo B, Passias PG. Outcomes analysis of staged versus same-day surgery patients undergoing identical cervical deformity corrective surgery. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  88. Passfall L, Kummer N, Krol O, Pierce K, Ahmad W, Naessig S, Saleh H, Vira S, Kapadia B, Lafage R, Diebo B, Lafage V, Passias PG. Identifying C2 slope and T1 slope thresholds for optimal functional and clinical outcomes in cervical deformity correction. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  89. Passfall L, Krol O, Kummer N, Naessig S, Ahmad W, Pierce K, Sagoo N, Saleh H, Diebo B, Kapadia B, Vira S, Passias PG. Quantifying complications associated with robotic elective spine surgery. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  90. Passias P, Passfall L, Kummer N, Krol O, Ahmad W, Naessig S, Pierce K, Abola M, Vira S, Kapadia B, O’Connell B, Maglaras C, Lafage R, Schoenfeld A, Diebo B, Lafage V. When does the construct need to extend to the thoracic spine in patients undergoing correction for cervical deformity? 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  91. Passias PG, Krol O, Kummer N, Passfall L, Vira S, Sagoo N, Zavodovsky V, Abola M. The effect of undercorrection on distal junctional kyphosis in adult cervical deformity patients. 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  92. Passias PG, Krol O, Passfall L, Kummer N, Ahmad W, Pierce K, Naessig S, Vira S, Kapadia B, Lafage R, Diebo B, Lafage V. Use of osteotomy techniques in cervical deformity procedures: are approaches and practices changing over the years? 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  93. Krol O, Passfall L, Kummer N, Vira S, Dinizo M, Abola M, Diebo B, Zavodovsky V, Sagoo N, Passias PG. Do robotic procedures have improved perioperative outcomes after a learning curve period? 36th Annual Meeting of the North American Spine Society (NASS), Boston, MA, Sept 29 – Oct 2, 2021.
  94. Krol O, Passias PG, Lafage V, Lafage R, Smith J, Line B, Vira S, Daniels A, Diebo B, Gum J, Kebaish K, Park P, Mundis G, Hostin R, Gupta M, Eastlack R, Anand N, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Klineberg E, Bess S, ISSG. Radiographic malalignment has a far greater impact on clinical outcomes than perioperative and postoperative complications in ASD surgery. 56th Scoliosis Research Society Annual Meeting, Louis, MS, Sept 22 – 25, 2021.
  95. Passias PG, Krol O, Lafage V, Lafage R, Smith J, Line B, Lipa S, Protopsaltis T, Daniels A, Diebo B, Vira S, Eastlack R, Mundis G, Hostin R, Gupta M, Anand N, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Klineberg E, Kim H, Bess S, ISSG. The clinical benefit of addressing the malalignment in revision surgery for proximal junctional kyphosis following ASD surgery. 56th Scoliosis Research Society Annual Meeting, Louis, MS, Sept 22 – 25, 2021.
  96. Pierce KE, Naessig S, Ahmad W, Passfall L, Krol O, Kapadia B, Vira S, Diebo B, Passias PG. Preoperative optimization of modifiable frailty factors reduces risk of hospital acquired conditions in elective surgical spine patients. 2021 Annual Meeting of the American Academy of Orthopaedic Surgeons, San Diego, CA, Aug 31 – Sept 3, 2021.
  97. Sagoo N, Haider A, Ozair A, Rahman M, Haider M, Sharma N, Paul J, Steinmetz M, Adogwa O, Aoun S, Passias P, Vira S. Percutaneous image-guided cryoablation of spinal tumors: a systematic review. 2021 American Association of Neurological Surgeons (AANS) Annual Scientific Meeting. Orlando, FL, August 21 – 25, 2021.
  98. Passfall L, Kummer N, Krol O, Diebo B, Vira S, Passias PG. Trends in 2 year outcomes of a prospective consecutively enrolled single-center adult cervical deformity series. Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  99. Krol O, Passfall L, Kummer N, Vira S, Passias PG. The effects of global alignment and proportionality scores on post-operative outcomes following ASD correction. Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  100. Passfall L, Kummer N, Krol O, Naessig S, Kapadia B, Vira S, Lafage R, Lafage V, Passias PG. What is the lowest achievable rate of complications following corrective surgery for adult spinal deformity? Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  101. Krol O, Passfall L, Kummer N, Ahmad W, Naessig S, Diebo B, Vira S, Lafage V, Passias PG. The influence of frailty on PJF- is optimal realignment superseded by physiologic age? Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  102. Passias PG, Krol O, Kummer N, Passfall L, Vira S, Diebo B. Use of osteotomy techniques in cervical deformity procedures: are approaches and practices changing over the years? Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  103. Krol O, Passias PG, Passfall L, Kummer N, Vira S, Diebo B. The effect of undercorrection on distal junctional kyphosis in ACD patients. Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  104. Passias PG, Krol O, Passfall L, Lafage V, Lafage R, Smith J, Line B, Daniels A, Vira S, Diebo B, Gum J, Kebaish K, Than K, Kim H, Hostin R, Gupta M, Eastlack R, Anand N, Ames C, Hart R, Burton D, Schwab F, Shaffrey C, Klineberg E, Bess S. Are we improving at 3-column osteotomy in terms of achieving optimal realignment and minimizing complications in ASD? Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  105. Krol O, Passias PG, Kummer N, Passfall L, Ahmad W, Vira S, Lebovic J. Comparison of complications, outcomes, and cost in frail vs non-frail ASD surgery patients. Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  106. Passfall L, Kummer N, Krol O, Naessig S, Ahmad W, Pierce K, Kapadia B, Vira S, Diebo B, Passias PG. Achievement of robus optimal alignment and functional status in adult spinal deformity surgery: 3-year outcome analysis. Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  107. Passias PG, Krol O, Passfall L, Kummer N, Vira S, Diebo B. Should our corrective re-alignments be tailored to different frailty states? Congress of Neurological Surgeons Spine Summit 2021 – 37th Annual Meeting of the Section on Disorders of the Spine and Peripheral Nerves, San Diego, CA, July 28-31, 2021.
  108. Pierce K, Ahmad W, Naessig S, Krol O, Passfall L, Kummer N, Vira S, Passias PG. The collective influence of lumbo-pelvic mismatch and proportional shape on clinical outcomes and proximal junctional kyphosis following adult spinal deformity corrective surgery. The International Society for the Advancement of Spine Surgery ISASS21, Miami, FL, May 12 – 15, 2021.
  109. Krol O, Passfall L, Kummer N, Passias PG, Vira S. Comparison of complications, outcomes, and cost in frail vs non-frail adult cervical deformity surgery patients. The International Society for the Advancement of Spine Surgery ISASS21, Miami, FL, May 12 – 15, 2021.
  110. Passfall L, Krol O, Kummer N, Kapadia B, Vira S, Passias PG. When does the construct need to extend to the thoracic spine in patients undergoing correction for cervical deformity? The International Society for the Advancement of Spine Surgery ISASS21, Miami, FL, May 12 – 15, 2021.
  111. Naessig S, Passias PG, Ahmad W, Pierce K, Lafage R, Lafage V, Eastlack R, Kim H,, Hamilton K, Protopsaltis T, Soroceanu A, Klineberg E, Hart R, Burton D, Bess S, Schwab F, Shaffrey C, Smith J, Ames C, Vira S, ISSG. Treatment of cervical deformity in the presence of a secondary thoracic deformity: outcomes based on inclusion and age-adjusted normalization. 28th International Meeting on Advanced Spine Techniques (IMAST). Virtual meeting, April 23-25, 2021.
  112. Naessig S, Ahmad W, Pierce K, Passfall L, Krol O, Kummer N, Kapadia B, Fernandez L, Diebo B, Passias PG, Vira S. Minimally invasive surgery mitigates but does not eliminate adverse perioperative outcomes for frail TLIF. 28th International Meeting on Advanced Spine Techniques (IMAST). Virtual meeting, April 23-25, 2021.
  113. Krol O, Passias PG, Passfall L, Kummer N, Vira S, Cronin P, Sagoo N. Evolution of cervical deformity surgery, outcomes and radiographic achievements among a multicenter prospective study; are we improving and changing our approach? 28th International Meeting on Advanced Spine Techniques (IMAST). Virtual meeting, April 23-25, 2021.
  114. Pierce K, Ahmad W, Naessig S, Krol O, Passfall L, Kummer N, Vira S, Diebo B, Lafage V, Passias PG. The modification of appropriateness criteria for a cervical deformity corrective surgery. 28th International Meeting on Advanced Spine Techniques (IMAST). Virtual meeting, April 23-25, 2021.
  115. Passias PG, Ahmad W, Naessig S, Pierce K, Segreto F, Vira S, Diebo B. Perioperative outcomes of concomitant shoulder diagnoses for patients undergoing cervical spine procedures. 48th Annual Meeting of the Cervical Spine Research Society (CSRS), Virtual meeting, Dec 10 – 12, 2020.
  116. Passias PG, Pierce KE, Lafage R, Lafage V, Klineberg E, Diebo B, Protopsaltis T, Hamilton K, Vira S, Burton D, Bess S, Schwab F, Shaffrey C, Smith J, Ames C. At what point should the thoracolumbar region be addressed in patients undergoing corrective cervical deformity surgery? 48th Annual Meeting of the Cervical Spine Research Society (CSRS), virtual meeting, Dec 10 – 12, 2020.
  117. Passias PG, Ahmad W, Bell J, Pierce K, Naessig S, Kummer N, Passfall L, Krol O, Segreto F, Vira S, Lafage V, Paulino C, Schoenfeld A, Diebo B, Hassanzadeh H. Impact of congestive heart failure on patients undergoing spinal surgery. Society for Minimally Invasive Spine Surgery (SMISS) Annual Forum 2020, Virtual Meeting, October 29-31, 2020.
  118. Passias PG, Ahmad W, Bell J, Naessig S, Pierce K, Passfall L, Krol O, Kummer N, Segreto F, Vira S, Lafage V, Paulino C, Schoenfeld A, Diebo B, Hassanzadeh H. Assessment of postoperative outcomes of spine fusion patients with history of cardiac disease. Society for Minimally Invasive Spine Surgery (SMISS) Annual Forum 2020, Virtual Meeting, October 29-31, 2020.
  119. Mulpuri N, Reddy N, Larsen K, Patel A, Diebo BG, Tappen L, Gill K, Vira S. Clinical outcomes of coccygectomy for coccydynia: a single center series of 173 patients with mean 5-year follow-up. Society for Minimally Invasive Spine Surgery (SMISS) Annual Forum 2020, Virtual Meeting, October 29-31, 2020.
  120. Passias PG, Ahmad W, Bell J, Naessig S, Pierce K, Krol O, Kummer N, Passfall L, Segreto F, Vira S, Lafage V, Paulino C, Schoenfeld A, Diebo B, Hassanzadeh H. Preoperative high frequency opioid use dramatically increases complication rate within 90 days, increases 2 year reoperation rates, and predisposes to opioid dependency following adult spinal deformity correction. Society for Minimally Invasive Spine Surgery (SMISS) Annual Forum 2020, Virtual Meeting, October 29-31, 2020.
  121. Passias PG, Pierce K, Passfall L, Adenwalla A, Naessig S, Ahmad W, Krol O, Kummer N, O’Malley N, Maglaras C, O’Connell B, Vira S, Schwab F, Errico T, Diebo B, Janjua B, Raman T, Buckland A, Lafage R, Protopsaltis T, Lafage V. Not frail and elderly: how invasive can we go in this different type of adult spinal deformity patient? Society for Minimally Invasive Spine Surgery (SMISS) Annual Forum 2020, Virtual Meeting, October 29-31, 2020.
  122. Passias PG, Pierce K, Naessig S, Krol O, Kummer N, Segreto F, Vira S, Passfall L, Diebo B. Do no harm: a retrospective analysis of the initial risk of complications in robotic spine surgery. Society for Minimally Invasive Spine Surgery (SMISS) Annual Forum 2020, Virtual Meeting, October 29-31, 2020.
  123. Passias PG, Naessig S, Kapadia B, Ahmad W, Pierce K, Passfall L, Krol O, Kummer N, Stickley C, Zhong J, Balouch E, O’Malley N, Buckland A, Hale S, White-Dzuro C, Diebo B, Vira S, O’Connell B, Maglaras C, Protopsaltis T, Gerling M. The deleterious effects of frailty on perioperative outcomes in spine surgery are mitigated by minimally invasive techniques. Society for Minimally Invasive Spine Surgery (SMISS) Annual Forum 2020, Virtual Meeting, October 29-31, 2020.
  124. Passias PG, Pierce KE, Lafage V, Lafage R, Klineberg EO, Diebo BG, Protopsaltis TS, Hamilton DK, Vira S, Line B, Hart RA, Burton DC, Bess S, Schwab FJ, Shaffrey C, Smith J, Ames C, ISSG. At what point should the thoracolumbar region be addressed in patients undergoing corrective cervical deformity surgery? 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020. Featured abstract/best paper session.
  125. Naessig S, Bortz C, Pierce KE, Ahmad W, Vira S, Diebo BG, Buckland AJ, Passias PG. PROMIS better reflects the impact of length of stay and the occurrence of complications within 90 days than legacy outcome measures for lumbar degenerative surgery. 35th Annual Meeting of the North American Spine Society (NASS), Virtual meeting, October 7-10, 2020.
  126. Pierce KE, Naessig S, Ahmad W, Segreto FA, Vira S, Maglaras C, O’Connell B, Paulino C, Bell J, Hassanzadeh H, Lafage R, Lafage V, Raman T, Protopsaltis TS, Buckland A, Diebo B, Passias PG. Preoperative optimization of modifiable frailty factors reduces risk of hospital acquired conditions in elective surgical spine patients. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  127. Naessig S, Pierce Ke, Leon C, Zhong J, Stickley C, Maglaras C, O’Connell B, Diebo B, White-Dzuro C, Vira S, Hale S, Protopsaltis TS, Buckland A, Passias PG. Minimally invasive surgery mitigates but does not eliminate adverse perioperative outcomes for frail TLIF. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  128. Naessig S, Ahmad W, Pierce K, Ayres E, Vira S, Passias PG. The inherent value of preoperative optimization: absolute and incremental reduction in components of metabolic syndrome can enhance recovery and minimize perioperative burden. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  129. Pierce KE, Ahmad W, Naessig S, Vira S, Lafage R, Lafage V, Buckland A, Protopsaltis TS, Diebo B, Passias PG. The modification of appropriateness criteria for a cervical deformity corrective surgery. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  130. Passias PG, Ahmad W, Bell J, Pierce KE, Naessig S, Segreto FA, Vira S, Lafage V, Paulino C, Schoenfeld A, Diebo B, Hassanzadeh H. Preoperative high frequency opioid use dramatically increases complication rate within 90 days, increases two year reoperation rates, and predisposes to opioid dependency following adult spinal deformity correction. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  131. Passias PG, Ahmad W, Pierce KE, Janjua MB, Vira S, Diebo B. Complication rates following Chiari malformation surgical management for Arnold-Chiari type 1 based on surgical variables: a national perspective. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  132. Naessig S, Ahmad W, Pierce Ke, Vira S, Diebo B, Passias PG. Trends in usage of navigation-assisted and robotic in elective spine surgeries: a study of 105,212 cases from 2007 to 2016. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  133. Ahmad W, Bell J, Naessig S, Pierce Ke, Segreto F, Vira S, Hirsch B, Paulino C, Schoenfeld A, Diebo B, Hassanzadeh H, Passias PG. Failure to normalize risk profile of spine fusion patients with coronary artery disease. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  134. Ahmad W, Bell J, Pierce KE, naessig S, Segreto F, Vira S, Lafage V, Paulino C, Schoenfeld A, Diebo V, Hassanzadeh H, Passias PG. Risk of surgical intervention is nearly normalized following coronary artery bypass grafting in spinal surgery with key exceptions. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  135. Passias PG, Ahmad W, Bell J, Naessig S, Pierce KE, Segreto F, Vira S, Lafage V, Diebo B, Hassanzadeh H. Risk of spinal surgery among individuals who have been re-vascularized for coronary artery disease. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  136. Ahmad W, Bell J, Pierce KE, Naessig S, Segreto F, Vira S, Lafage V, Paulino C, Schoenfeld A, Diebo BG, Hassanzadeh H, Passias PG. Effect of osteoporosis and bisphosphonate on reoperations in adult spinal deformity. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  137. Passias PG, Brown A, Pierce KE, Ahmad W, Naessig S, Vira S, Lebovic J, Diebo B. Economic impact of the initial incorporation of robotics in spine surgery. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  138. Ahmad W, Bell J, Pierce KE, Naessig S, Segreto FA, Vira S, Lafage V, Paulino C, Schoenfeld AJ, Diebo B, Hassanzadeh H, Passias PG. Bone morphogenetic protein usage decreases the risk of reoperations after anterior cervical discectomy and fusion a five year survivorship analysis. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  139. Bortz C, Pierce KE, Alas H, Brown A, Vira S, Diebo B, Passias PG. Enhanced utility with greater number of levels treated for patient-specific, pre-contoured rods in posterior cervical fusion. 35th Annual Meeting of the North American Spine Society (NASS), virtual meeting, October 7-10, 2020.
  140. Whitecloud Best Clinical Abstract Nominee: Pierce KE, Bortz C, Alas H, Brown A, Naessig S, Ahmad W, Diebo B, Schoenfeld A, Raad M, Gerling M, Vira S, Passias PG. The 5-item modified frailty index is predictive of 30-day postoperative complications in patients undergoing spine surgery. 27th International Meeting on Advanced Spine Techniques (IMAST), Virtual Meeting, July 10-18th, 2020.
  141. Whitecloud Best Clinical Abstract Nominee: Alas H, Brown A, Pierce K, Bortz C, Ahmad W, Naessig S, Buckland A, Gerling M, Wang E, Manning J, Passias PG, Vira S. Differential rates of perioperative and postoperative outcomes in robot-assisted versus unassisted elective lumbar interbody fusions. 27th International Meeting on Advanced Spine Techniques (IMAST), Virtual Meeting, July 10-18th, 2020.
  142. Srivatsa S, Vira S, Krishnaney A. Reducing wrong level spinal surgeries through root cause analyses: a ten year longitudinal analysis of a single tertiary institution’s iterative policy improvements. Global Spine Congress 2020, Virtual meeting, May 20-23, 2020.
  143. Srivatsa S, Vira S, Krishnaney A. Reducing wrong level spinal surgeries through root cause analyses: a ten year longitudinal analysis of a single tertiary institution’s iterative policy improvements. 2020 American Association of Neurological Surgeons (AANS) Annual Scientific Meeting. Virtual meeting, April 25-29, 2020.
  144. Pierce K, Bortz C, Alas H, Brown A, Naessig S, Ahmad W, Diebo B, Schoenfeld A, Raad M, Gerling M, Vira S, Passias PG. The 5-item modified frailty index is predictive of 30-day postoperative complications in patients undergoing spine surgery. The 27th International Meeting on Advanced Spine Techniques (IMAST). Virtual meeting, April 1-4, 2020.
  145. Alas H, Brown A, Pierce K, Bortz C, Ahmad W, Naessig S, Buckland A, Gerling M, Wang E, Janning J, Passias PG, Vira S. Differential rates of perioperative and postoperative outcomes in robot-assisted versus unassisted elective lumbar interbody fusions. The 27th International Meeting on Advanced Spine Techniques (IMAST). Virtual Meeting, April 1-4, 2020.
  146. Passias PG, Pierce K, Ahmad W, Naessig S, Vira S, Diebo B, Gerling M, Maglara C, Buckland A. Defining spino-pelvic alignment goals for adult spinal deformity surgery that optimize outcomes by incorporating age and frailty status: a step toward individualized medicine. The 27th International Meeting on Advanced Spine Techniques (IMAST). Virtual Meeting, April 1-4, 2020.
  147. Pierce K, Bortz C, Brown A, Alas H, Pierce K, Ahmad W, Naessig S, Vira S, Diebo B, Raman T, Protopsaltis T, Buckland A, Gerling M, Lafage R, Lafage R. Mitigating pelvic non-response to surgery by incorporating BMI into alignment targets for operative adult spinal deformity patients. The 27th International Meeting on Advanced Spine Techniques (IMAST). Virtual meeting, April 1-4, 2020.
  148. Bortz C, Brown A, Pierce K, Alas H, Segreto F, Naessig S, Ahmad W, Vira S, Vasquez-Montes D, Diebo B, Neuman B, Gerling M. Passias PG. Frequency and implications of concurrent complications following adult spinal deformity corrective surgery. The 27th International Meeting on Advanced Spine Techniques (IMAST). Virtual Meeting, April 1-4, 2020.
  149. Bortz C, O’Connell B, Brown A, Pierce K, Alas H, Naessig S, Ahmad W, Vira S, Vasquez-Montes D, Diebo B, Neuman B, Gerling M, Passias PG. Re-defining “never events” in elective spine surgery: are existing hospital acquired conditions really reasonably preventable? The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  150. Bortz C, Pierce K, Alas H, Brown A, Naessig S, Ahmad W, Vira S, Diebo B, Passias P. Enhanced utility with greater number of levels treated for patient-specific pre-contoured rods in posterior cervical fusion. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  151. Brown A, Alas H, Pierce K, Bortz C, Ahmad W, Naessig S, Hassanzadeh H, Labaran L, Puvanesarajah V, Diebo B, Vira S, Protopsaltis T, Lafage V, Lafage R, Passias PG. Frailty does not negatively affect cost utility in adult spinal deformity. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  152. Passias PG, Brown A, Pierce K, Bortz C, Alas H, Ahmad W, Naessig S, Hassanzadeh H, Labaran L, Puvanesarajah V, Diebo B, Vira S, Protopsaltis T, Buckland A, Gerling M. Metabolic syndrome negatively impacts cost utility in spine surgery. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  153. Pierce K, Naessig S, Ahmad W, Vira S, Diebo B, Lafage R, Lafage V, Passias PG. Preoperative optimization of modifiable frailty factors reduces risk of hospital acquired conditions in elective surgical spine patients. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  154. Brown A, Pierce K, Bortz C, Alas H, Ahmad W, Naessig S, Hassanzadeh H, Labaran L, Puvanesarajah V, Vira S, Diebo B, Protopsaltis T, Buckland A, Passias PG. The economic impact of non-reimbursable events in open, minimally invasive, and robot assisted lumbar fusion surgery. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  155. Passias PG, Pierce K, Bortz C, Alas H, Brown A, Ahmad w, Naessig S, Diebo B, Raman T, Protopsaltis T, Buckland A, Vira S, Gerling M. Does matching Roussouly spinal shape and improvement in SRS-Schwab modified contribute to improved patient-reported outcomes? The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  156. Passias PG, Alas H, Brown A, Pierce K, Bortz C, Ahmad W, Naessig S, Lafage R, Vira S, Lafage V. “Reverse Roussouly:” Ratios of cervical to thoracic shape curvature in an adult cervical deformity population. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  157. Passias PG, Alas H, Brown A, Bortz C, Pierce K, Ahmad W, Naessig S, Diebo B, Vira S, Gerling M. Bariatric surgery diminishes spinal symptoms in a morbidly obese population: A 2-year survivorship analysis of cervical and lumbar pathologies. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  158. Passias PG, Pierce K, Bortz C, Ahmad W, Naessig S, Vira S, Diebo B, Gerling M. The modified adult spinal deformity frailty index (mASD-FI) is a good preoperative risk assessment tool. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  159. Passias PG, Pierce K, Naessig S, Ahmad W, Vira S, Diebo B, Gerling M, Maglaras C, Buckland A. Health related quality of life measures in adult spinal deformity: can we replace the SRS-22 with PROMIS? The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  160. Passias PG, Naessig S, Ahmad W, Pierce K, Saleh H, segreto F, Diebo B, Vira S, Bell J, Hassanzadeh H. Concurrent rates of peripheral neuropathy and cervical spine diagnoses: are PN patients being misdisagnosed/mistreated? The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  161. Passias PG, Naessig S, Pierce K, Ahmad W, Segreto F, Vira S, Fischer C, Jain D, Lord E, Diebo B, O’Connell B, Maglaras C, Protopsaltis T, Buckland A. External validation of the NSQIP calculator utilizing a single institutional experience for adult spinal deformity corrective surgery. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  162. Passias P, Brown A, Ahmad W, Pierce K, Naessig S, Bortz C, Alas H, Diebo B, Vira S. Trends in robotic spine surgery: a six year analysis of morbidity and mortality. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  163. Passias PG, Ahmad W, Pierce K, Naessig S, Diebo B, Segreto F, Vira S. “Do No Harm:” A retrospective analysis of the initial risk of complications in robotic spine surgery.
  164. Srivatsa S, Vira S, Krishnaney A. Reducing wrong level spinal surgeries through root cause analyses: a ten year longitudinal analysis of a single tertiary institution’s iterative policy improvements. The 27th International Meeting on Advanced Spine Techniques (IMAST). Athens, Greece, April 1-4, 2020.
  165. Bortz C, Pierce KE, Brown A, Alas H, Vasquez-Montes D, Vira S, Diebo B, Gerling M, Passias PG. Frequency and implications of concurrent complications following adult spinal deformity corrective surgery. 2020 Annual Meeting of the American Academy of Orthopaedic Surgeons. Orlando, Florida, March 24-28, 2020.
  166. Srivatsa S, Vira S, Krishnaney A. Reducing wrong level spinal surgeries through root cause analyses: a ten-year longitudinal analysis of a single tertiary institution’s iterative policy improvements. 36th Annual Meeting of the Joint Section on Disorders of the Spine and Peripheral Nerves. Las Vegas, NV, March 5-8, 2020.
  167. Ahmad W, Bortz C, Brown A, Alas H, Pierce KE, Naessig S, Janjua MB, Vira S, Diebo B, Gerling M, Passias PG. Same day surgical intervention dramatically minimizes complication occurrence and optimizes peri-operative outcomes for central cord syndrome. The International Society for the Advancement of Spine Surgery ISASS20, San Juan, Puerto Rico, February 26-28, 2020.
  168. Pierce KE, Passias PG, Alas H, Brown A, Bortz C, Vazquez-Montes D, Naessig S, Ahmad W, Diebo B, Vira S. Effects of traumatic brain injuries and spinal cord injuries on spine surgery outcomes. The International Society for the Advancement of Spine Surgery ISASS20, San Juan, Puerto Rico, February 26-28, 2020.
  169. Passias PG, Pierce KE, Bortz C, Alas H, Brown A, Wang E, Vira S, Naessig S, Ahmad W. Early versus delayed surgical intervention of patients with cauda equina syndrome. The International Society for the Advancement of Spine Surgery ISASS20, San Juan, Puerto Rico, February 26-28, 2020.
  170. Passias PG, Bortz C, Pierce KE, Alas H, Brown A, Vira S, Diebo B, Buckland AJ, Ahmad W, Naessig S, Lafage V. A simpler, modified frailty index weighted by complication occurrence correlates to pain and disability for adult spinal deformity patients. The International Society for the Advancement of Spine Surgery ISASS20, San Juan, Puerto Rico, February 26-28, 2020.
  171. Passias PG, Bortz C, Brown A, Pierce KE, Alas H, Vira S, Diebo B, Neurman BJ, Gerling M, Chern I, Ahmad W, Naessig S, Jackson-Fowl BH. Re-defining “never events” in elective spine surgery: are existing hospital acquired conditions really reasonably preventable? The International Society for the Advancement of Spine Surgery ISASS20, San Juan, Puerto Rico, February 26-28, 2020.
  172. Srivatsa S, Krishnaney A, Vira S. Reducing wrong level spinal surgeries through root cause analyses: a ten year longitudinal analysis of a single tertiary institution’s iterative policy improvements. Spine: Base to Summit 2020, Vail, CO, January 23 – 26, 2020.
  173. Khan HA, Stumpf S, Isbester K, Overley S, Vira S, Steinmetz MP, Mroz TP. “Anterior lumbar interbody fusion reduces thecal sac compression in the setting of degenerative spondylolisthesis.” Congress of Neurological Surgeons (CNS) Annual Meeting, San Francisco, CA, October 19-23, 2019.
  174. Bao H, Moal B, Vira S, Cruz D, Amabile C, Errico T, Schwab F, Skalli W, Dubousset J, Lafage V. Spinofemoral muscles affect sagittal alignment and compensatory recruitment: a new look into soft tissues in adult spinal deformity. Best Poster Award, AO Spine Fellowship. Global Spine Congress 2019, Toronto, Canada, May 15-18, 2019.
  175. Segreto FA, Horn SR, Bortz C, Manning J, Vasquez-Montes D, Diebo BG, Alas H, Brown AE, Vira S, Stekas N, Moawad MA, Lafage R, Lafage V, Buckland AJ, Gerling MC, Passias PG. Impact of presenting patient characteristics on surgical complications and morbidity in early onset scoliosis. The International Society for the Advancement of Spine Surgery ISASS19, Anaheim, CA, April 3-5, 2019.
  176. Passias PG, Bortz C, Vasquez-Montes D, Segreto FA, Horn SR, Brown A, Alas H, Frangella NJ, Stekas N, Zhou PL, Varlotta C, Manning JH, Vira S, Gerling MC, Buckland AJ. Quantitative age-adjusted targets for ideal cervicothoracic sagittal alignment in asymptomatic adults. The International Society for the Advancement of Spine Surgery ISASS19, Anaheim, CA, April 3-5, 2019.
  177. Passias PG, Horn SR, Segreto FA, Wang E, Bortz C, Vasquez-Montes D, Stekas N, Hockley A, Vira S, Diebo BG, Brown A, Alas H, Horowitz JA, Hassanzadeh H, Moawad MA, Lafage R. Incidence of VACTERL associations in the United States pediatric population and associated frequency among congenital spinal diagnoses. The International Society for the Advancement of Spine Surgery ISASS19, Anaheim, CA, April 3-5, 2019.
  178. Passias PG, Horn SR, Vasquez-Montes D, Alas H, Shepard NA, Bortz CA, Pierce KE, Segreto FA, Varlotta CG, Hockley A, Diebo BG, Vira S, Neuman BJ, Scuibba DM, Lafage R. Chiari malformation clusters describe differing presence of concurrent anomalies based on Chiari type. The International Society for the Advancement of Spine Surgery ISASS19, Anaheim, CA, April 3-5, 2019.
  179. Passias PG, Horn SR, Lafage V, Lafage R, Smith JS, Line BG, Vira S, Mundis GM, Diebo BG, Pierce KE, Bortz CA, Daniels AH, Klineberg EO, Burton DC, ISSG. Risk benefit assessment of major versus minor osteotomies for flexible and rigid cervical deformity correction. The International Society for the Advancement of Spine Surgery ISASS19, Anaheim, CA, April 3-5, 2019.
  180. Passias PG, Horn SR, Manning J, Segreto FA, Bortz C, Vasquez-Montes D, Line BG, Oh C, Alas H, Brown AE, Vira S, Diebo BG, Bendo JA, Lafage R, Lafage V, Hassanzadeh H. Hospital acquired conditions occur more frequently in elective spine surgery than for other common elective procedures. The International Society for the Advancement of Spine Surgery ISASS19, Anaheim, CA, April 3-5, 2019.
  181. Passias PG, Segreto FA, Pierce KE, Moses M, Bortz CA, Horn SR, Wang E, Diebo BG, Shenoy K, Vira S, Lafage R, Lafage V, Protopsaltis TS, Errico TJ. Do hospital and patient characteristics predict extended length of stay in patients undergoing primary spine procedures? The International Society for the Advancement of Spine Surgery ISASS19, Anaheim, CA, April 3-5, 2019.
  182. Bortz C, Vasquez-Montes D, Horn SR, Segreto FA, O’Connell B, Buza JA, Stekas N, Alas H, Brown AE, Lafage V, Lafage R, Gerling MC, Moawad MA, Vira S, Diebo B, Peter PG. Clusters of predicting factors for pseudarthrosis: a 10 year analysis of 101929 thoracolumbar spine fusions. The International Society for the Advancement of Spine Surgery ISASS19, Anaheim, CA, April 3-5, 2019.
  183. Passias PG, Horn SR, Vasquez-Montes D, Segreto FA, Bortz CA, Brown A, Pierce KE, Stekas N, Varlotta CG, Hockley A, Frangella N, Diebo BG, Lafage R, Vira S, Gerling MC, Lafage V. Age-adjusted spinopelvic alignment and surgical invasiveness in cervical deformity correction. The International Society for the Advancement of Spine Surgery ISASS19, Anaheim, CA, April 3-5, 2019.
  184. Passias PG, Horn S, Segreto FA, Bortz C, Shepard N, Vira S, Diebo B, Lafage R, Lafage V. Hospital-acquired conditions occur more frequently in elective spine surgery than for other common elective surgical procedures. 2019 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Las Vegas, NV, March 12-16, 2019
  185. Passias PG, Bortz C, Vasquez-Montes D, Segreto F, Horn S, Frangella N, Stekas N, Steinmetz L, Varlotta C, Ge D, Manning J, Brown A, Pierce K, Alas H, Diebo B, Vira S, Gerling M, Lafage R, Schwab F, Fischer C, Protopsaltis T, Lafage V, Buckland A, Errico T. Quantitative age-adjusted targets for ideal cervicothoracic sagittal alignment in asymptomatic adults. Congress of Neurological Surgeons (CNS) Section on Disorders of the Spine and Peripheral Nerves Spine Summit 2019. Miami, FL, March 14-17, 2019.
  186. Passias PG, Horn SR, Vasquez-Montes D, Segreto FA, Bortz CA, Poorman GW, Jalai CM, Sciubba DM, Raad M, Diebo BG, Vira S, Horowitz JA, Hassanzadeh H, Lafage R, Lafage V. Undergoing bariatric surgery lowers complication rates following spine surgery in morbidly obese patients. Cervical Spine Research Society 46th Annual Meeting, Scotsdale, AZ, Dec 6-8, 2018.
  187. Passias PG, Bortz C, Vasquez-Montes D, Segreto F, Horn S, Diebo B, Vira S, Gerling MC, Lafage R, Schwab F, Fischer C, Protopsaltis T, Lafage V, Buckland AJ, Errico TJ. Quantitative age-adjusted targets for idea cervicothoracic sagittal alignment in asymptomatic adults. Cervical Spine Research Society 46th Annual Meeting, Scotsdale, AZ, Dec 6-8, 2018.
  188. Horn SR, Vasquez-Montes D, Segreto FA, Bortz CA, Hockley A, Diebo BG, Lafage R, Vira S, Gerling M, Lafage V, Buckland AJ, Protopsaltis TS, Errico TJ, Passias PG. Cervical deformity correction fails to achieve age-adjusted spino-pelvic alignment targets. Cervical Spine Research Society 46th Annual Meeting, Scotsdale, AZ, Dec 6-8, 2018.
  189. Segreto FA, Bortz C, Horn SR, Vasquez-Montes D, Baker JF, Kuprys TK, Moawad MA, Diebo BG, Vira S, Lafage R, Lafage V, Protopsaltis TS, Buckland AJ, Errico TJ, Passias PG. Traumatic cervical spinal cord injuries with fracture: an investigation of early vs. delayed surgery among 6636 propensity matched patients. Cervical Spine Research Society 46th Annual Meeting, Scotsdale, AZ, Dec 6-8, 2018.
  190. Horn SR, Segreto FA, Bortz C, Vasquez-Montes D, Jalai C, Moon J, Steinmetz L, Frangella NJ, Diebo BG, Shenoy K, Vira S, Hockley A, Kuprys TK, Horowitz JA, Dhillon ES, Hassanzadeh H, Neuman BJ, Raad M, Sciubba DM, Lafage R, Lafage V, Passias PG. Ossification of the posterior longitudinal ligament in cervical spine cases: high complication rates may have led to decreased use of anterior approach in the US from 2005-2013. 53rd Scoliosis Research Society (SRS) Annual Meeting, Bologna, Italy, October 10-13, 2018.
  191. Passias PG, Horn SR, Segreto FA, Bortz C, Vasquez-Montes D, Steinmetz L, Stekas N, Hockley A, Vira S, Ramos R, Diebo BG, Moawad MA, Deflorimonte C, Horowitz JA, Hassanzadeh H, Lafage R, Lafage V, Nikas D, Errico TJ. Incidence of VACTERL associations in the United States pediatric population and associated frequency among congenital spinal diagnoses. 53rd Scoliosis Research Society (SRS) Annual Meeting, Bologna, Italy, October 10-13, 2018.
  192. Segreto FA, Bortz C, Horn SR, Vasquez-Montes D, Vira S, Varlotta CG, Moawad MA, Diebo BG, Lafage R, Lafage V, Hockley A, Petrizzo AM, Protopsaltis TS, Errico TJ, Gerling MC, Passias PG. Congenital and idiopathic early onset scoliosis: a comparison of presenting comorbidity profiles. 53rd Scoliosis Research Society (SRS) Annual Meeting, Bologna, Italy, October 10-13, 2018.
  193. Passias PG, Horn SR, Vasquez-Montes D, Bortz C, Segreto FA, Poorman GW, Jalai CM, Wang C, Buza JA, Liu TC, Steinmetz L, Varlotta C, Vira S, Deibo B, Horowitz JA, Hassanzadeh H, Lafage R, Lafage V, Afthinos J. Bariatric surgery population at significantly increased risk of spinal disorders and surgical intervention compared to morbidly obese patients. 33rd Annual Meeting of the North American Spine Society (NASS), Las Angeles, CA Sept 26-29, 2018.
  194. Passias PG, Horn SR, Vasquez-Montes D, Segreto FA, Bortz C, Poorman GW, Jalai CM, Wang C, Frangella NJ, Stekas N, Deflorimonte C, Raad M, Diebo BG, Vira S, Horowitz JA, Hassanzadeh H, Lafage R, Afthinos J, Lafage V. Prior bariatric surgery lowers complication rates following spine surgery in obese patients. 33rd Annual Meeting of the North American Spine Society (NASS), Las Angeles, CA Sept 26-29, 2018.
  195. Passias PG, Horn SR, Bortz C, Segreto FA, Vasquez-Montes D, Line B, Oh C, Ramos R, Moon JY, Arnold PM, Vira S, Diebo BG, Stekas N, Frangella NJ, Liu TC, Shepard N, Horowitz JA, Lafage R, Hassanzadeh H, Bendo JA, Lafage V. Hospital acquired conditions occur more frequently in elective spine surgery than for other common elective surgical procedures. 33rd Annual Meeting of the North American Spine Society (NASS), Las Angeles, CA Sept 26-29, 2018.
  196. Passias PG, Horn SR, Segreto FA, Bortz C, Vasquez-Montes D, Zhou PL, Moon JY, Frangella NJ, Stekas N, Steinmetz L, Varlotta C, Ge DH, Johnson B, Vira S, Diebo BG, Deflorimonte C, Moawad MA, Lafage R, Lafage V, Schwab FJ, Gerling MC, Fischer CR, Protopsaltis TS, Buckland AJ, Errico, TJ. Regional and segmental changes of the spine from standing to sitting: a chain of compensation. 33rd Annual Meeting of the North American Spine Society (NASS), Las Angeles, CA Sept 26-29, 2018.
  197. Passias PG, Segreto FA, Lafage R, Lafage V, Smith JS, Line B, Bortz C, Horn SR, Klineberg EO, Neuman BJ, Kim HJ, Kelly MP, Diebo BG, Vira S, Burton DC, Hart RA, Schwab FJ, Hockley A, Shaffrey CI, Ames CP, ISSG. Effect of cervical deformity correction on stenosis, spinal canal and cord compression utilizing magnetic resonance and computed tomography imaging modalities. 33rd Annual Meeting of the North American Spine Society (NASS), Las Angeles, CA Sept 26-29, 2018.
  198. Passias PG, Bortz C, Segreto FA, Horn SR, Steinmetz L, Varlotta C, Stekas N, Jalai CM, Frangella NJ, Raman T, Ge DH, DelSole EM, Manning JH, Vasquez-Montes D, Moawad MA, Deflorimonte C, Diebo BG, Vira S, Schwab FJ, Lafage R, Lafage V, Gerling MC, Fischer CR, Protopsaltis TS, Buckland AJ, Errico TJ. Pelvic incidence affects age-adjusted alignment outcomes in a population of adult spinal deformity. 33rd Annual Meeting of the North American Spine Society (NASS), Las Angeles, CA Sept 26-29, 2018.
  199. Passias PG, Segreto FA, Bortz C, Horn SR, Vasquez-Montes D, Raman T, Kuprys T, Moawad MA, Diebo B, Vira S, Lafage R, Lafage V, Protopsaltis TS, Buckland AJ, Errico TJ. Traumatic cervical spinal cord injuries with fracture: an investigation of early versus delayed surgery among 6,636 propensity-matched patients. 33rd Annual Meeting of the North American Spine Society (NASS), Las Angeles, CA Sept 26-29, 2018.
  200. Passias PG, bortz C, Vasquez-Montes D, Segreto FA, Horn SR, Frangella NJ, Stekas N, Steinmetz L, Shenoy K, Zhou PL, Varlotta C, Ge DH, Manning JH, Moawad MA, Deflorimonte C, Diebo BG, Vira S, Gerling MC, Lafage R, Schwab FJ, Fischer CR, Protopsaltis TS, Lafage V, Buckland AJ, Errico TJ. Quantitative Age-adjusted targets for ideal cervicothoracic sagittal alignment in asymptomatic adults. 33rd Annual Meeting of the North American Spine Society (NASS), Las Angeles, CA Sept 26-29, 2018.
  201. Passias PG, Segreto FA, Horn SR, Bortz C, Vasquez Montes D, Steinmetz L, Moon J, Raman T, Varlotta CG, Frangella NJ, Stekas N, Ge DH, Manning JH, Moawad M, Deflorimonte C, Diebo BG, Vira S, Lafage R, Lafage V, Gerling MC, Fischer CR, Protopsaltis TS, Buckland AJ, Errico TJ. Defining age-adjusted spinopelvic alignment thresholds: should we integrate BMI? The 25th International Meeting on Advanced Spine Techniques (IMAST), Las Angeles, CA, July 11-14, 2018.
  202. Passias PG, Segreto FA, Lafage R, Lafage V, Smith JS, Line B, Bortz C, Horn SR, Klineberg EO, Neuman BJ, Kim HJ, Kelly MP, Diebo BG, Vira S, Burton DC, Hart RA, Schwab FJ, Hockley A, Shaffrey CI, Ames CP, ISSG. Effect of cervical deformity correction on stenosis, spinal canal and cord compression utilizing magnetic resonance and computed tomography imaging modalities. Congress of Neurological Surgeons 2018 Annual Meeting. Houston, TX Oct 6-10, 2018.
  203. Segreto FA, Horn SR, Bortz C, Vasquez-Montes D, Diebo BG, Vira S, Stekas N, Ge DH, Moawad MA, Lafage R, Lafage V, DelSole EM, Hockley A, Petrizzo AM, Buckland AJ, Errico TJ, Gerling MC, Passias PG. Impact of presenting patient characteristics on surgical complications and morbidity in early onset scoliosis. The 25th International Meeting on Advanced Spine Techniques (IMAST), Las Angeles, CA, July 11-14, 2018.
  204. Horn S, Poorman G, Tishelman J, Stekas N, Frangella N, Segreto F, Moon J, Behery O, Shepard N, Diebo B, Vira S, Passias PG. The epidemic of metastatic spine disease: national trends in prevalence and surgical management. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  205. Horn S, Frangella N, Poorman G, Vasquez-Montes D, Diebo B, Bortz C, Segreto F, Steinmetz L, Stekas N, Moon J, Zhou P, Vira S, Sure A, Siow M, Tishelman J, Beaubrun B, Bronson W, Wang C, Errico TJ, Lafage V, Buckland A, Passias PG. Full-body analysis of adult spinal deformity patients’ age-adjusted alignment at 1 year. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  206. Passias PG, Poorman G, Wang C, Vira S, Jalai C, Diebo B, Horn S, Bortz C, Segreto F, Steinmetz L, Varlotta C, Tishelman J, Wang S, Lafage R, Lafage V. Comparative analysis of changes in spinal canal dimension and myelopathy improvement between patients with and without cervical deformity. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  207. Horn S, Vasquez-Montes D, Sure A, Siow M, Poorman G, Diebo B, Bortz C, Segreto F, Varlotta C, STekas N, Zhou P, Moon J, Tishelman J, Beaubrun B, Wang C, Vira S, Gerling M, Protopsaltis T, Errico TJ, Buckland A, Passias PG. Compensatory mechanisms in postoperative cervical deformity patients. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  208. Passias PG, Horn S, Poorman G, Vira S, Vasquez-Montes D, Bortz C, Segreto F, Frangella N, Ge D, Moon J, Zhou P, Diebo B, Sure A, Tishelman J, Beabrun B, Jalai C, Wang C, Errico TJ, Protopsaltis T, Buckland A, Lafage V. Sustained changes in age-adjusted full-body compensation following adult spinal deformity corrective surgery. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  209. Passias PG, Poorman G, Segreto F, Jalai C, Horn S, Bortz C, Vasquez-Montes, Ge D, Stekas N, Diebo B, Vira S, Bono O, De La Garza-Ramos R, Moon J, Wang C, Hirsch B, Zhou P, Gerling M, Koller H, Lafage V. Traumatic fractures of the cervical spine: analysis of changes in incidence, etiology, concurrent injuries and complications among 488,262 patients from 2005-2013. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  210. Passias PG, Poorman G, Horn S, Jalai C, Bortz C, Segreto F, Ge D, Varlotta C, Worley N, Yang S, Poorman G, Buza J, Boniello A, Lee A, Vira S, Diebo B, Lafage V, Schwab F, Protopsaltis T, Errico T. Bone marrow concentration vs. iliac crest bone graft: 2-year results in a single-blinded randomized controlled trial on thoracolumbar spinal fusion bone grafts in multi-level adult spinal deformity. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  211. Passias PG, Segreto F, Horn S, Bortz C, Vasquez-Montes D, Poorman G, Steinmetz L, Ge D, Zhou P, Diebo B, Moon J, Tishelman J, Sure A, Beaubrun B, Vira S, Jalai C, Buza J, Wang C, Lafage V, Protopsaltis T, Buckland A, Errico T. The influence of BMI on achieving age adjusted alignment goals in adult spinal deformity corrective surgery with full body analysis at 1 year. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  212. Passias PG, Pyne A, Horn S, Poorman G, Janjua M, Vasquez-Montes D, Frangella N, Bortz C, Segreto F, Ge D, Siow M, Sure A, Zhou P, Moon J, Diebo B, Vira S. Developments in the treatment of Chiari Type 1 malformations over the past decade. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  213. Passias PG, Horn S, Poorman G, Tishelman J, Moon J, Beaubrun B, Zhou P, Steinmetz L, Bortz C, Segreto F, Frangella N, Vaynrub M, Vasquez-Montes D, Diebo B, Vira S, Raad M, Sciubba D, Lafage V, Schwab F, Errico T. Trends in the treatment of Scheuermann’s kyphosis: a study of 1070 cases from 2003 – 2012. The International Society for the Advancement of Spine Surgery ISASS18, Toronto, ON, April 11-13, 2018.
  214. Passias PG, Horn S, Segreto F, Poorman G, Vasquez-Montes D, Bortz C, Vira S, Buckland A, Gerling M, Errico TJ. Adult spinal deformity: the influence of BMI on achieving postoperative age-adjusted alignment goals. Lumbar Spine Research Society 11th Annual Meeting, Chicago, IL, April 5-6, 2018.
  215. Passias PG, Horn S, Lafage R, Lafage V, Smith J, Line B, Vira S, Mundis G, Diebo B, Bortz C, Segreto F, Protopsaltis T, Kim H, Daniels A, Klineberg E, Burton D, Hart R, Schwab F, Bess S, Shaffrey C, Ames C, ISSG. Risk benefit assessment of major versus minor osteotomies for flexible and rigid cervical deformity correction. Eurospine 2018, Barcelona, Spain, Sept 19-21, 2018.
  216. Passias PG, Poorman G, Wang C, Vira S, Jalai CM, Diebo BG, Bortz C, Segreto F, Horn SR, Tishelman J, Wang S, Lafage R, Lafage V. Comparative analysis of changes in spinal canal dimension and myelopathy improvement between patients with and without cervical deformity. Spine Summit 2018: The Annual Meeting of the AANS/CNS Section on Disorders of the Spine and Peripheral Nerves. Orlando, FL, March 14-18, 2018.
  217. Poorman GW, Beaubrun BM, Horn SR, Diebo BG, Vira S, Bono O, De La Garza R, Moon J, Wang C, Hirsch BP, Tishelman JC, Zhou PL, Gerling MC, Passias PG. Cervical spine trauma in children: analysis of changes in incidence, etiology, and concurrent injuries among 11,323 pediatric patients over a 10 year period. 45th Annual Meeting of the Cervical Spine Research Society (CSRS), Hollywood, FL, Nov 30 – Dec 2, 2017.
  218. Passias PG, Poorman GW, Horn S, Bortz CA, Segreto FA, Vira S, Protopsaltis TS, Lafage V, Schwab F, Errico TJ. The 2017 Scientific Program and Sir Robert Jones Lecture. NYU Hospital for Joint Diseases, New York, NY, Nov 9-10, 2017.
  219. Passias PG, Poorman G, Beaubrun B, Horn S, Zhou P, Tishelman J, Vira S, Diebo B, Janjua M, Gerling M. Changing patterns in the prevalence and mechanisms of injury for cervical spine fractures in the United States. Congress of Neurological Surgeons 2017 Annual Meeting. Boston, MA Oct 7-11, 2017.
  220. Passias PG, Horn S, Poorman G, Janjua M, Vasquez Montes D, Siow M, Sure A, Zhou P, Moon J, Diebo B, Vira S. Developments in the treatment of Chiari type 1 malformations over the past decade. Congress of Neurological Surgeons 2017 Annual Meeting. Boston, MA Oct 7-11, 2017.
  221. Poster: Passias PG, Poorman GW, Wang C, Vaynrub M, Tishelman JC, Janjua MB, Vasquez-Montes D, Zhou PL, Moon J, Horn SR, Diebo BG, Vira S. Contemporary presentation and recent surgical trends of Klippel-Feil Syndrome. 52nd Scoliosis Research Society (SRS) Annual Meeting, Philadelphia, PA, September 6-9, 2016.
  222. Passias PG, Poorman GW, Vasquez-Montes D, Wang C, Moon J, Zhou PL, Horn SR, Diebo BG, Vira S. Cluster analysis describes constellations of cardiac anomalies presenting in spinal anomaly patients. 52nd Scoliosis Research Society (SRS) Annual Meeting, Philadelphia, PA, September 6-9, 2016.
  223. Passias PG, Wang C, Poorman GW, Horn SR, Diebo BG, Vira S, Wang S. Cervical alignment comparative analysis of fixed irreducible vs reducible atlantoaxial dislocations. 32nd Annual Meeting of the North American Spine Society (NASS), Orlando, FL, Oct 25-28th, 2017.
  224. Horn SR, Ramchandran S, Poorman GW, Siow MY, Sure A, Vasquez-Montes D, Diebo BG, Tishelman JC, Moon JY, Zhou PL, Beaubrun BM, Vira S, Jalai CM, Wang C, Shenoy K, Behery O, Errico TJ, Lafage V, Buckland AJ, Passias PG. Sub-optimal age-adjusted lumbo-pelvic mismatch predicts negative cervical-thoracic compensation in obese patients. 32nd Annual Meeting of the North American Spine Society (NASS), Orlando, FL, Oct 25-28th, 2017.
  225. Horn SR, Vasquez-Montes D, Sure A, Siow MY, Poorman GW, Diebo B, Zhou PL, Moon JY, Tishelman JC, Beaubrun BM, Wang C, Vira S, Gerling MC, Protopsaltis TS, Errico TJ, Buckland AJ, Passias PG. Thoracolumbar deformity impedes improvement of lower extremity compensatory mechanisms in post-operative cervical deformity patients. 32nd Annual Meeting of the North American Spine Society (NASS), Orlando, FL, Oct 25-28th, 2017.
  226. Passias PG, Wang C, Poorman GW, Vira S, Jalai C, Diebo BG, Horn SR, Lafage R, Tishelman JC, Lafage V. Comparative analysis of changes in spinal canal dimension and myelopathy improvement between patients with and without cervical deformity. The 24th International Meeting on Advanced Spine Techniques (IMAST), Cape Town, South Africa, July 12-15, 2017.
  227. Jalai C, Diebo B, Cruz D, Poorman G, Vira S, Horn S, Moon J, Beaubrun B, Buckland A, Lafage R, Bess S, Errico T, Lafage V, Passias P. The impact of obesity on compensatory mechanisms in response to progressive sagittal malalignment. The International Society for the Advancement of Spine Surgery ISASS17, Boca Raton, FL, April 12-15th, 2017.
  228. Ferrero E, Lafage R, Vira S, Oren JH, DelSole EM, Rohan PY, Guigui P, Schwab FJ, Lafage V, Skalli W. Reliability of Transverse plane parameters for tridimensional analysis of adult spinal deformity. The International Society for the Advancement of Spine Surgery ISASS17, Boca Raton, FL, April 12-15th, 2017.
  229. Passias P, Poorman G, Jalai C, Diebo B, Vira S, Horn S, Moon J, Zhou P, Baker J, Shenoy K, Hasan S, Buza J, Bronson W, Paul J, Kaye I, Atanda A, Foster N, Cassilly R, Oren J, Moskovich R, Line B, Oh C, Bess S, Lafage V, Errico T. Incidence of congenital spinal abnormalities among pediatric patients and their association with scoliosis and systemic anomalies. The International Society for the Advancement of Spine Surgery ISASS17, Boca Raton, FL, April 10-12, 2017.
  230. Atanda A, Baker J, Diebo B, Errico TJ, Jalai C, Lafage V, Passias PG, Poorman GW, Vira S. Incidence of congenital spinal abnormalities among pediatric patients and their association with scoliosis and systemic anomalies. 2017 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), San Diego, CA, March 14-17, 2017.
  231. Passias PG, Poorman GW, Jalai CM, Soroceanu A, Line B, Bess S, Vira S, Diebo BG, Ramachandran S, Foster NA, Oren JH, Protopsaltis TS, Errico TJ, Buckland AJ, Lafage V. Thresholds of body mass index as a predictor of morbidity in lumbar spinal surgery based on surgical invasiveness. 31st Annual Meeting of the North American Spine Society (NASS), Boston, MA, Oct 26-29th, 2016.
  232. Ferrero E, Lafage R, Vira S, Rohan PY, Oren J, Delsole EM, Guigui P, Schwab F, Lafage V, Skalli W. Three-dimensional reconstruction using stereoradiography for evaluating adult spinal deformity: a reproducibility study. Congrés de la Société Francaise de Chirurgie Orthopédique et Traumatologique. Nov 8-11, 2016, Paris, France.
  233. Jalai C, Diebo B, Cruz D, Poorman G, Vira S, Buckland A, Lafage R, Bess S, Schwab F, Errico T, Lafage V, Passias P. The impact of obesity on compensatory mechanisms in response to progressive sagittal malalignment. 31st Annual Meeting of the North American Spine Society (NASS), Boston, MA, Oct 26-29th, 2016.
  234. Jalai C, Diebo B, Cruz D, Poorman G, Vira S, Buckland A, Lafage R, Bess S, Schwab F, Errico T, Lafage V, Passias P. The impact of obesity on compensatory mechanisms in response to progressive sagittal malalignment. 51st Scoliosis Research Society (SRS) Annual Meeting, Prague, Czech Republic, September 21-24, 2016.
  235. Poster: Poorman G, Jalai C, Diebo B, Vira S, Baker J, Shenoy K, Hasan S, Buza J, Bronson W, Paul J, Kaye D, Atanda A, Lafage V, Errico, Passias P. Congenital vs. idiopathic scoliosis: comparison of in-hospital co-morbidities using nationwide inpatient database (KID). 51st Scoliosis Research Society (SRS) Annual Meeting, Prague, Czech Republic, September 21-24, 2016.
  236. Poster: Passias P, Poorman G, Jalai C, Diebo B, Vira S, Baker J, Shenoy K, Hasan S, Buza J, Bronson W, Paul J, Kaye D, Atanda A, Lafage V, Errico T. Incidence of congenital spinal abnormalities among pediatric patients and their association with scoliosis and systemic anomalies. 51st Scoliosis Research Society (SRS) Annual Meeting, Prague, Czech Republic, September 21-24, 2016.
  237. Jalai C, Cruz D, Diebo B, Poorman G, Lafage R, Bess S, Ramchandran S, Day L, Vira S, Liabaud B, Henry J, Schwab F, Lafage V, Passias P. Full-body analysis of age-adjusted alignment in adult spinal deformity patients and lower-limb compensation. 51st Scoliosis Research Society (SRS) Annual Meeting, Prague, Czech Republic, September 21-24, 2016.
  238. Jalai C, Diebo B, Cruz D, Poorman G, Vira S, Buckland A, Lafage R, Bess S, Schwab F, Errico T, Lafage V, Passias P. The impact of obesity on compensatory mechanisms in response to progressive sagittal malalignment. The 23rd International Meeting on Advanced Spine Techniques (IMAST), Washington DC, July 13-16, 2016.
  239. Bao H, Moal B, Vira S, Cruz D, Amabile C, Errico T, Schwab F, Skalli W, Lafage V. Spino-femoral muscles affect sagittal alignment and compensatory recruitment: a new look into soft tissues in adult spinal deformity. The 23rd International Meeting on Advanced Spine Techniques (IMAST), Washington DC, July 13-16, 2016.
  240. Buckland A, Vira S, Oren J, Lafage R, Harris B, Spiegel M, Diebo B, Liabaud B, Protopsaltis T, Schwab F, Errico T, Lafage V, Bendo J. When does compensation for lumbar stenosis become a deformity? The International Society for the Advancement of Spine Surgery ISASS16, Las Vegas, NV, April 6-8, 2016.
  241. Lafage R, Liabaud B, Diebo B, Oren J, Gammal I, Vira S, Spiegel M, Tanzi E, Protopsaltis T, Errico T, Schwab F, Lafage V. Defining the role of the lower limbs in compensating for sagittal malalignment. The International Society for the Advancement of Spine Surgery ISASS16, Las Vegas, NV, April 6-8, 2016.
  242. Vira S, Diebo B, Spiegel M, Liabaud B, Henry J, Oren J, Lafage R, TGanzi E, Protopsaltis T, Errico T, Schwab F, Lafage V. Is there a gender-specific recruitment pattern in the setting of progressive sagittal malalignment? . The International Society for the Advancement of Spine Surgery ISASS16, Las Vegas, NV, April 6-8, 2016.
  243. Spiegel M, Henry J, Gammal I, Jalai C, Tanzi E, Vira S, Oren J, Protopsaltis T, Errico T, Lafage V, Schwab F. Importance of preoperative planning for adult spinal deformity correction. The International Society for the Advancement of Spine Surgery ISASS16, Las Vegas, NV, April 6-8, 2016.
  244. Jalai CM, Passias P, Worley N, Vira S, Poorman G. Surgical site infections following treatment of cervical spondylotic myelopathy: prevalence, predictors of occurrence, and influence on peri-operative outcomes. The International Society for the Advancement of Spine Surgery ISASS16, Las Vegas, NV, April 6-8, 2016.
  245. Worley N, Jalai CM, Poorman G, Vira S, Wang S, Errico TJ, Gerling MC, Passias PG. Diabetes as a predictor for extended length of hospital stay and complications in patients treated surgically for cervical spondylotic myelopathy. The International Society for the Advancement of Spine Surgery ISASS16, Las Vegas, NV, April 6-8, 2016.
  246. Passias PG, Jalai CM, Worley N, Vira S, Gerling M, Wang S, Lafage V, Errico TJ. Predictors of length of hospital stay and 30-day readmission in cervical spondylotic myelopathy patients: an analysis of 3057 patients using the American College of Surgeons Database. The International Society for the Advancement of Spine Surgery ISASS16, Las Vegas, NV, April 6-8, 2016.
  247. Diebo B, Oren J, Spiegel M, Vira S, Tanzi E, Liabaud B, Lafage R, Henry J, Protopsaltis T, Errico T, Schwab F, Lafage V. Cervical kyphosis does not imply cervical deformity: predicting cervical curvature required for horizontal gaze based on spinal global alignment and thoracic kyphosis. The International Society for the Advancement of Spine Surgery ISASS16, Las Vegas, NV, April 6-8, 2016.
  248. Poster: Schwab F, Oren J, Vira S, Liabaud B, Diebo B, Tanzi E, Spiegel M, Lafage R, Henry J, Lafage V. Chain of relaxation: how sagittal correction affects spino-pelvic, lower limb, and global alignment parameters. Eurospine 2015. Copenhagen, Denmark. September 2-4, 2015.
  249. Poster: Lafage V, Lafage R, Oren J, Vira S, Harris B, Spiegel M, Diebo B, Protopsaltis T, Errico TJ, Schwab FJ. Unlocking TPA’s clinical and sagittal significance by analyzing its relation to pelvic tilt. Eurospine 2015. Copenhagen, Denmark. September 2-4, 2015.
  250. Challier V, Diebo B, Vira S, Spiegel M, Harris B, Lafage R, Liabaud B, Henry J, Schwab F, Lafage V. Global sagittal angle (GSA): a step toward full body assessment for spinal deformity. Eurospine 2015. Copenhagen, Denmark. September 2-4, 2015.
  251. Challier V, Diebo B, Oren J, Vira S, Liabaud B, Lafage R, Henry J, Protopsaltis T, Schwab F, Lafage V. Cervical kyphosis does not imply cervical deformity: predicting cervical curvature required for horizontal gaze based on spinal global alignment and thoracic kyphosis. Eurospine 2015. Copenhagen, Denmark. September 2-4, 2015. Best of Outside- Europe Presentation Nomination.
  252. Buckland AJ, Vira S, Oren JH, Lafage R, Harris BY, Spiegel MA, Diebo BG, Liabaud B, Protopsaltis TS, Schwab FJ, Lafage V, Errico TJ, Bendo JA. When does compensation for lumbar stenosis become a clinical sagittal plane deformity? 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Orlando, Florida, March 1-5, 2016.
  253. Poster: Gerling MC, Passias PG, Vira S, Bianco K, Worley N, Jalai C, Oh C, Radcliff K, Isaacs R, Cowgill I, Arnold P, Hsieh P, Vaccaro AR. CSM surgery complication rates, predictors of their development, and effect on outcomes at 2- years. 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Orlando, Florida, March 1-5, 2016.
  254. Poster: Diebo BG, Vira S, Oren JH, Liabaud B, Lafage R, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Predicting cervical curvature required for horizontal gaze: implication for cervical and thoracolumbar surgeons. 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Orlando, Florida, March 1-5, 2016.
  255. Poster: Passias PG, Jalai CM, Worley N, Vira S, Marascalchi B, Lafage V, Errico TJ. Adult spinal deformity: national trends in the presentation, treatment, and perioperative outcomes from 2003-2010. 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Orlando, Florida, March 1-5, 2016.
  256. Worley N, Jalai CM, Vira S, Wang S, Errico T, Gerling M, Passias PG. Diabetes as a predictor for extended hospital stay and complications in surgically treatment CSM patients. 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Orlando, Florida, March 1-5, 2016.
  257. Passias PG, Jalai CM, Worley N, Vira S, White AP, Gerling M, Lafage V, Errico T. Length of stay and 30-day readmission predictors in cervical spondylotic myelopathy patients: an analysis of 3057 ACS- NSQIP patients. 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Orlando, Florida, March 1-5, 2016.
  258. Oren JO, Vira S, Liabaud B, Diebo BG, Spiegel MA, Lafage R, Errico TJ, Schwab FJ, Lafage V. Chain of relaxation: how sagittal correction affects spino-pelvic, lower limb, and global alignment. 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Orlando, Florida, March 1-5, 2016.
  259. Liabaud B, Lafage R, Oren JH, Vira S, Harris BY, Spiegel MA, Diebo BG, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Unlocking TPA’s clinical and sagittal significance by analyzing its relation to pelvic tilt. 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Orlando, Florida, March 1-5, 2016.
  260. Lafage R, Liabaud B, Diebo BG, Oren JH, Gammal ID, Vira S, Spiegel MA, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Defining the role of the lower limbs in compensating for sagittal malalignment. 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS), Orlando, Florida, March 1-5, 2016.
  261. DelSole E, Buckland A, George S, Vira S, Lafage V, Vigdorchik J. Spino-pelvic tilt: a more accurate measure of pelvic tilt than anterior pelvic plane. 28th Annual Congress of the International Society for Technology in Arthroplasty (ISTA), Vienna, Austria, Sept 30 – Oct 3, 2015.
  262. Diebo BG, Oren JH, Spiegel MA, Vira S, Tanzi EM, Liabaud B, Lafage R, Henry JK, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Cervical kyphosis does not imply cervical deformity: predicting cervical curvature required for horizontal gaze based on spinal global alignment and thoracic kyphosis. 43rd Annual Meeting of the Cervical Spine Research Society (CSRS), San Diego, CA, Dec 3-5, 2015.
  263. Poster: Lafage R, Liabaud B, Diebo BG, Oren JH, Gammal ID, Vira S, Spiegel MA, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Defining the role of the lower limbs in compensating for sagittal malalignment. 50th Scoliosis Research Society (SRS) Annual Meeting, Minneapolis, Minnesota, September 30 – October 3, 2015.
  264. Diebo BG, Oren JH, Vira S, Spiegel MA, Harris BY, Lafage R, Liabaud B, Henry JK, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Global sagittal angle (GSA): a step toward full body assessment for spinal deformity. 50th Scoliosis Research Society (SRS) Annual Meeting, Minneapolis, Minnesota, September 30 – October 3, 2015.
  265. Buckland AJ, Vira S, Oren JH, Lafage R, Harris BY, Spiegel MA, Diebo BG, Liabaud B, Protopsaltis TS, Schwab FJ, Lafage V, Errico TJ, Bendo JA. When does compensation for lumbar stenosis become a deformity? 50th Scoliosis Research Society (SRS) Annual Meeting, Minneapolis, Minnesota, September 30 – October 3, 2015.
  266. Diebo BG, Oren JH, Spiegel MA, Vira S, Tanzi EM, Liabaud B, Lafage R, Henry JK, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Cervical kyphosis does not imply cervical deformity: predicting cervical curvature required for horizontal gaze based on spinal global alignment and thoracic kyphosis. 50th Scoliosis Research Society (SRS) Annual Meeting, Minneapolis, Minnesota, September 30 – October 3, 2015.
  267. Vira S, Diebo BG, Spiegel MA, Liabaud B, Henry JK, Oren JH, Lafage R, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Is there a gender specific recruitment pattern in the setting of progressive sagittal malalignment? The 22nd International Meeting on Advanced Spine Techniques (IMAST), Kuala Lumpur, Malaysia, July 8-11, 2015.
  268. Passias P, Jalai C, Worley N, Vira S, Gerling M, Lafage V, Errico TJ. Predictors of length of hospital stay and 30-day readmission in cervical spondylotic myelopathy patients: an analysis of 3057 patients using the American College of Surgeons database. The 22nd International Meeting on Advanced Spine Techniques (IMAST), Kuala Lumpur, Malaysia, July 8-11, 2015.
  269. Passias P, Worley N, Jalai C, Vira S, Gerling M, Lafage V, Errico TJ. Predictors of length of hospital stay and 30- day readmission in adult spinal deformity surgical patients: an analysis of 963 patients using the American College of Surgeons database. The 22nd International Meeting on Advanced Spine Techniques (IMAST), Kuala Lumpur, Malaysia, July 8-11, 2015.
  270. Lafage R, Liabaud B, Diebo BG, Oren JH, Gammal ID, Vira S, Spiegel MA, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Defining the role of the lower limbs in compensating for sagittal malalignment. The 22nd International Meeting on Advanced Spine Techniques (IMAST), Kuala Lumpur, Malaysia, July 8-11, 2015.
  271. Menga EN, Spiegel MA, Vira S, Lafage R, Henry JK, Liabaud B, Oren JH, Worley N, Protopsaltis TS, Schwab FJ, Errico TJ, Lafage V. Time dependent changes in preoperative sagittal alignment parameters: radiographic and clinical considerations. 30th Annual Meeting of the North American Spine Society (NASS), Chicago, IL, Oct 14-17, 2015.
  272. Diebo BG, Oren JH, Vira S, Spiegel MA, Harris BY, Lafage R, Liabaud B, Henry JK, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Global sagittal angle (GSA): a step toward full body assessment for spinal deformity. 30th Annual Meeting of the North American Spine Society (NASS), Chicago, IL, Oct 14-17, 2015.
  273. Buckland AJ, Vira S, Oren JH, Lafage R, Harris BY, Spiegel MA, Diebo BG, Liabaud B, Protopsaltis TS, Schwab FJ, Lafage V, Errico TJ, Bendo JA. When does compensation for lumbar stenosis become a deformity? 30th Annual Meeting of the North American Spine Society (NASS), Chicago, IL, Oct 14-17, 2015.
  274. Liabaud B, Lafage R, Oren JH, Vira S, Harris BY, Spiegel MA, Diebo BG, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Unlocking TPA’s clinical and sagittal significance by analyzing its relation to pelvic tilt. 30th Annual Meeting of the North American Spine Society (NASS), Chicago, IL, Oct 14-17, 2015.
  275. Vira S, Diebo BG, Spiegel MA, Liabaud B, Henry JK, Oren JH, Lafage R, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V. Is there a gender specific recruitment pattern in the setting of progressive sagittal malalignment? The 2015 Scientific Program and Sir Robert Jones Lecture. NYU Hospital for Joint Diseases, New York, NY, May 14-15, 2015.
  276. Ferrero E, Lafage R, Vira S, Diebo BG, Ilharreborde B, Schwab F, Skalli W, Lafage V. Tridimensional analysis of rotatory subluxation and sagittal spino-pelvic alignment in the setting of adult spinal deformity. 83rd American Association of Neurological Surgeons (AANS) Annual Scientific Meeting. May 2-6, 2015.
  277. Worley N, Jalai C, Vira S, Passias PG. Predictors of length of hospital stay and return to OR in adult spinal deformity surgical patients: an analysis of patients using the American College of Surgeons database. 8th Annual Meeting of the Lumbar Spine Research Society, Chicago, IL, April 9-10, 2015.
  278. Jalai C, Worley N, Vira S, Passias P. Adult Spinal Deformity: National Trends in the Presentation, Treatment, and Peri-operative Outcomes over 10 Years. 8th Annual Meeting of the Lumbar Spine Research Society, Chicago, IL, April 9-10, 2015.
  279. Worley N, Jalai C, Vira S, Passias P. Predictors of Length of Hospital Stay and Return to OR in Adult Spinal Deformity Surgical Patients: an analysis of patients using the American College of Surgeons database. 8th Annual Meeting of the Lumbar Spine Research Society, Chicago, IL, April 9-10, 2015.
  280. Diebo B, Passias P, Marascalchi B, Jalai C, Worley N, Vira S, Errico T, Lafage V. Adult spinal deformity: national trends in the presentation, treatment, and peri-operative outcomes over 10 years. 8th Annual Meeting of the Lumbar Spine Research Society, Chicago, IL, April 9-10, 2015.
  281. Protopsaltis T, Lafage R, Spiegel M, Ferrero E, Oren J, Errico T, Vira S, Diebo BG, Schwab F, Lafage V. Full body EOS dynamic radiographic analysis of laminoplasty vs posterior cervical decompression/fusion patients correlated to HRQOL. Podium Presentation, 15th Annual Meeting of the International Society for the Advancement of Spine Surgery (ISASS), San Diego, CA April 15-17, 2015.
  282. Ferrero E, Lafage R, Vira S, Diebo BG, Ilharreborde B, Schwab F, Skalli W, Lafage V. Tridimensional analysis of rotatory subluxation and sagittal spino-pelvic alignment in the setting of adult spinal deformity. Podium Presentation, 15th Annual Meeting of the International Society for the Advancement of Spine Surgery (ISASS), San Diego, CA, April 15-17, 2015.
  283. Ferrero E, Vira S, Challier V, Ames C, Kebaish K, Gupta M, Boachie-Adjei O, Smith J, Mundis G, Liabaud B, Protopsaltis T, Schwab F, Lafage V, ISSG. Analysis of an unexplored group of sagittal deformity patients: large sagittal malalignment but low pelvic tilt. Podium Presentation, 15th Annual Meeting of the International Society for the Advancement of Spine Surgery (ISASS), San Diego, CA April 15-17, 2015.
  284. Ferrero E, Vira S, Liabaud B, Challier V, Lafage R, Diebo BG, Liu S, Protopsaltis T, Errico T, Schwab F, Lafage V. Sagittal plane analysis: role of pelvic translation and the lower extremities in compensation to spinal deformity. Oral Poster, 15th Annual Meeting of the International Society for the Advancement of Spine Surgery (ISASS), San Diego, CA April 15-17, 2015.
  285. Ravin R, Blank P, Ravin N, Vira S, Bezrukov L, Guerrero-Cazares A, Guinones-Hinojosa Alfredo, Bezrukov S; Zimmerberg J. Shock waves simulating blast-induced traumatic brain injury activate purinergic signaling in astrocytes. Biophysical Society 57th Annual Meeting, February 2-6, 2013. abstract proceedings: Biophysical Journal. 104 (2): 616a-617a.
  286. Vira S, Figgie M. Total knee replacement at HSS in subjects under 35 years of age. Hospital for Special Surgery Summer Symposium. New York, NY, August 13, 2009.
  287. Vira N; Vira S. Towards development of a non-touch man-machine interface for intelligent presenter-audience collaborative environment. Proceedings of ASME International Design Engineering Technical Conference & Computer and Information Engineering Conference, Philadelphia, PA, Sept. 2006. ISBN: 0-7918-3784-X, DETC2006-99267, 1-9.
  288. Vira N; Vira S. Surgeon’s magic wand: a screen pointing interactive method. Proceedings of Bioinformatics and Computational Biology (BIOCOMP’06). ISBN: 1-60132-002-7, CSREA Press, June 2006. 222-228.
  289. Vira N, Vira S. Surgeon’s magic wand: a screen pointing interactive method. The 2006 World Congress in Computer Engineering and Applied Computing. Las Vegas, NV, June 25, 2006.
  290. Vira N, Vira S. Non-touch man-machine interface. ASME International Design Engineering Conference. Philadelphia, PA, Sept. 11-13, 2006.
  291. Vira S, Blank P, Humphrey G, Mekhedov E, Zimmerberg J. Surface expression of influenza hemagglutinin. National Institutes of Health Summer Research Program Poster Day, Bethesda, MD, Aug. 2005.
  292. Vira S. Effect of mutant B2-microglobulin on the folding of MHC class I molecules. Howard Hughes Medical Institute Symposium Proc. May 2004. 10.67.
  1. Adenwalla A, Badejo O, Larsen K, Reddy N, Mulpuri N, Vira S. Thoracic degenerative conditions. Multidisciplinary Spine Care. Springer, 2021.
  2. Vira S, Enders J, Habboub G, Steinmetz M, Benzel E. Future of Spine Surgery. AO Spine Textbook. Comprehensive Overview on Surgical Management of the Spine. Jaypee Brothers, London. 689-696. 2020. ISBN: 9789386056955.
  3. Vira S, Spiegel MA, Lafage V, Schwab FJ. Cervical alignment. Cervical Myelopathy. Passias PG. Jaypee Brothers, London. 25-32. 2015. ISBN: 978-93-5152-492-2.
  4. Vira S, Spiegel M, Lafage V, Schwab FJ. Cervical myelopathy in the setting of cervical deformities. Cervical Myelopathy. Passias PG. Jaypee Brothers, London. 201-212. 2015. ISBN: 978-93-5152-492-2.
  5. Menga E, Vira S, Bendo J. The role of total disk replacement for the treatment of cervical myelopathy. Cervical Myelopathy. Passias PG. Jaypee Brothers, London. 237-242. 2015. ISBN: 978-93-5152-492-2.
  6. Diebo BG, Vira S, Feng J, Schwab FJ, Lafage V. Classifications of spinal deformity. Youmans Neurological Surgery, 7th Elsevier, Philadelphia. 2017. ISBN: 978-0323287821.
  7. Vira S, Worley N, Jalai C, Passias PG. 11. Atypical infections. Orthopaedic Surgery Essentials: Spine, 2nd edition. Bono CM, Schoenfeld AJ. Lippincott Williams & Watkins, Philadelphia. 2017. 104-109. ISBN: 9781496318541.
  8. Cruz D, Vira S, Lafage V, Protopsaltis T, Errico TJ. Spinal deformity associated with neurodegenerative disease in adults. Neuromuscular Spine Deformity. Samdani, Sponseller, Newton, Betz, Shufflebarger. 2018. Thieme Publishers, New York. ISBN 978-1626232600.
  9. Vira S, Rana A, Patel J. New payment paradigms. Insall & Scott: Surgery of the Knee, 6th edition. Scott WN. Elsevier, Philadelphia. 2018. 2053-2056. ISBN 978-0-323-40046-6.

Wrote and edited speeches given by Representative Ed Royce (CA):

  1. US Congress. Representative Ed Royce (CA). Honoring Myldred E. Jones. Congressional Record – House H4503. 109th cong. 2nd sess. June 22, 2006. Delivered on the US House Floor.

  2. US Congress. Representative Ed Royce (CA). In honor and remembrance of Colonel Young Oak Kim. Congressional Record – House H4503. 109th cong. 2nd sess. June 22, 2006. Delivered on US House Floor.

  3. Indian American Friendship Council address. 109th cong. 2nd sess. July 18, 2006. Delivered in Cannon Caucus Room. audience: 25 members of Congress and 500 distinguished guests.

  1. Vira S, Shah M. No benefit to debride chondral lesions during partial meniscectomy. Commentary on: “Bisson et al. Patient outcomes after observation versus debridement of unstable chondral lesions during partial meniscectomy: the chondral lesions and meniscus procedures (ChAMP) randomized controlled trial.” International Congress for Joint Reconstruction (ICJR) Journal Watch.

  2. Morton J, Vira S, Horn SR, Poorman GW, Passias PG. Is idiopathic scoliosis idiopathic? Annals of Neurological Surgery. 2017; 1 (1): 1004-05.

  3. Vira S, Husain Q, Jalai C, Paul J, Poorman GW, Poorman C, Yoon RS, Looze C, Lonner B, Passias PG. Response to a letter from the editor. Journal of Pediatric Orthopaedics. Apr 2018. PMID 29324531.

  4. Sun Y, Vira S, Passias PG. A Viable Option for Treating Multilevel Cervical Degenerative Disc Disease – a recently published randomized controlled trial demonstrates improved neurologic outcomes in patients treated with total disc replacement versus the gold standard of anterior cervical discectomy and fusion. International Congress for Joint Reconstruction (ICJR) Journal Watch. March 6, 2017.

  5. Vira S, Passias PG. Octogenarians can benefit from surgery for lumbar stenosis and degenerative spondylolisthesis, Commentary on: Rihn et al. “Effectiveness of surgery for lumbar stenosis and degenerative spondylolisthesis in the octogenarian population: analysis of the spine patient outcomes research (SPORT) data.” International Congress for Joint Reconstruction (ICJR) Journal Watch. June 18, 2015. http://icjr.net/report_398_lumbar_stenosis.htm#.VcdfubDJDmI

  6. Vira S, Passias PG. Not all lumbar stenosis patients are candidates for surgery, Commentary on: Gerling et al. Risk factors for reoperation in patients treated surgically for lumbar stenosis: a subanalysis of the 8 year data from the SPORT trial.” International Congress for Joint Reconstruction (ICJR) Journal Watch. International Congress for Joint Reconstruction (ICJR) Journal Watch. April 26, 2016. http://icjr.net/report_2016_891_txt_lumbar_ stenosis.htm#.V02LQeQUXcc

  7. Vira S. Long term improvement of global health in the third world. Feature Article, NYU Journal of Politics and International Affairs. Vol. 2, April 2006. 12–17.

  8. Vira S. Introducing accountability in the World Bank: a novel strategy to increase the effectiveness of foreign aid. NYU Economic Review. Vol. 1, May 2007. 40–47.

  9. Vira S. Medical camps: an innovative model to increase health care access in low resource settings.” Gallatin Journal of Global Affairs. May 2008. 57.

  10. Vira S. Bringing complex surgical services to rural communities. Journal of the American Association of Physicians of Indian Origin. Winter 2010-2011. 21-22.

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