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A Novel MRI Tool for Evaluating Cortical Bone Thickness of the Proximal Femur.

Ramme AJ, Vira S, Hotca A, Miller R, Welbeck A, Honig S, Egol KA, Rajapakse CS, Chang G.

Bull Hosp Jt Dis (2013). 2019 Mar;77(2):115-121.


Recovery kinetics following spinal deformity correction: a comparison of isolated cervical, thoracolumbar, and combined deformity morphometries.

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; International Spine Study Group.

Spine J. 2019 Mar 28. pii: S1529-9430(19)30116-0. doi: 10.1016/j.spinee.2019.03.006. [Epub ahead of print]


Traumatic Fracture of the Pediatric Cervical Spine: Etiology, Epidemiology, Concurrent Injuries, and an Analysis of Perioperative Outcomes Using the Kids' Inpatient Database.

Poorman GW, Segreto FA, Beaubrun BM, Jalai CM, Horn SR, Bortz CA, Diebo BG, Vira S, Bono OJ, DE LA Garza-Ramos R, Moon JY, Wang C, Hirsch BP, Tishelman JC, Zhou PL, Gerling M, Passias PG.

Int J Spine Surg. 2019 Feb 22;13(1):68-78. doi: 10.14444/6009. eCollection 2019 Jan.


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.

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 SN, Bendo JA, Goldstein JA, Schwab FJ, Gerling MC.

J Orthop. 2018 Dec 20;16(1):36-40. doi: 10.1016/j.jor.2018.12.011. eCollection 2019 Jan-Feb.


Impact of presenting patient characteristics on surgical complications and morbidity in early onset scoliosis.

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.

J Clin Neurosci. 2019 Apr;62:105-111. doi: 10.1016/j.jocn.2018.12.007. Epub 2019 Jan 8.


Development of New-Onset Cervical Deformity in Nonoperative Adult Spinal Deformity Patients With 2-Year Follow-Up.

Passias PG, Jalai CM, Worley N, Vira S, Scheer JK, Smith JS, Ramachandran S, Soroceanu A, Horn SR, Poorman GW, Protopsaltis TS, Klineberg EO, Sciubba DM, Kim HJ, Hamilton DK, Lafage R, Lafage V, Ames CP; INTERNATIONAL SPINE STUDY GROUP (ISSG).

Int J Spine Surg. 2018 Dec 21;12(6):725-734. doi: 10.14444/5091. eCollection 2018 Dec.


Trends in Treatment of Scheuermann Kyphosis: A Study of 1,070 Cases From 2003 to 2012.

Horn SR, Poorman GW, Tishelman JC, Bortz CA, Segreto FA, Moon JY, Zhou PL, Vaynrub M, Vasquez-Montes D, Beaubrun BM, Diebo BG, Vira S, Raad M, Sciubba DM, Lafage V, Schwab FJ, Errico TJ, Passias PG.

Spine Deform. 2019 Jan;7(1):100-106. doi: 10.1016/j.jspd.2018.06.004.


Decreased rates of 30-day perioperative complications following ASD-corrective surgery: A modified Clavien analysis of 3300 patients from 2010 to 2014.

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 SN, Sciubba DM, Raad M, Neuman BJ, Gerling MC.

J Clin Neurosci. 2019 Mar;61:147-152. doi: 10.1016/j.jocn.2018.10.104. Epub 2018 Nov 10.


Prior bariatric surgery lowers complication rates following spine surgery in obese patients.

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.

Acta Neurochir (Wien). 2018 Dec;160(12):2459-2465. doi: 10.1007/s00701-018-3722-6. Epub 2018 Nov 8.


Incidence, trends, and associated risks of developmental hip dysplasia in patients with Early Onset and Adolescent Idiopathic Scoliosis.

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.

J Orthop. 2018 Aug 15;15(3):874-877. doi: 10.1016/j.jor.2018.08.015. eCollection 2018 Sep.


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.

Horn SR, Segreto FA, Ramchandran S, Poorman GR, Sure A, Marascalachi 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.

World Neurosurg. 2018 Dec;120:e533-e545. doi: 10.1016/j.wneu.2018.08.123. Epub 2018 Aug 27.


Cluster analysis describes constellations of cardiac anomalies presenting in spinal anomaly patients.

Passias PG, Poorman GW, Vasquez-Montes D, Wang C, Jalai C, Horn SR, Steinmetz LM, Bortz CA, Segreto FA, Moon J, Zhou PL, Diebo BG, Vira S.

Acta Neurochir (Wien). 2018 Aug;160(8):1613-1619. doi: 10.1007/s00701-018-3596-7. Epub 2018 Jun 28.


Adverse Outcomes and Prediction of Cardiopulmonary Complications in Elective Spine Surgery.

Passias PG, Poorman GW, Delsole E, Zhou PL, Horn SR, Jalai CM, Vira S, Diebo B, Lafage V.

Global Spine J. 2018 May;8(3):218-223. doi: 10.1177/2192568217718817. Epub 2017 Oct 24.


Clinical Impact and Economic Burden of Hospital-Acquired Conditions Following Common Surgical Procedures.

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.

Spine (Phila Pa 1976). 2018 Nov 15;43(22):E1358-E1363. doi: 10.1097/BRS.0000000000002713.


Developments in the treatment of Chiari type 1 malformations over the past decade.

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 SN.

J Spine Surg. 2018 Mar;4(1):45-54. doi: 10.21037/jss.2018.03.14.


Epidemiology and national trends in prevalence and surgical management of metastatic spinal disease.

Horn SR, Dhillon ES, Poorman GW, Tishelman JC, Segreto FA, Bortz CA, Moon JY, Behery O, Shepard N, Diebo BG, Vira S, Passias PG.

J Clin Neurosci. 2018 Jul;53:183-187. doi: 10.1016/j.jocn.2018.04.022. Epub 2018 Apr 19.


Full-Body Analysis of Adult Spinal Deformity Patients' Age-Adjusted Alignment at 1 Year.

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.

World Neurosurg. 2018 Jun;114:e775-e784. doi: 10.1016/j.wneu.2018.03.079. Epub 2018 Mar 16.


Importance of the Sagittal Plane in Understanding Adult Spinal Deformities.

Paul JC, Vira S, Quirno M, Protopsaltis T.

Bull Hosp Jt Dis (2013). 2018 Mar;76(1):80-84. Review.


Response to a Letter to the Editor.

Vira S, Husain Q, Jalai C, Paul J, Poorman GW, Poorman C, Yoon RS, Looze C, Lonner B, Passias PG.

J Pediatr Orthop. 2018 Apr;38(4):e237. doi: 10.1097/BPO.0000000000001122. No abstract available.


Body mass index predicts risk of complications in lumbar spine surgery based on surgical invasiveness.

Bono OJ, Poorman GW, Foster N, Jalai CM, Horn SR, Oren J, Soroceanu A, Ramachandran S, Purvis TE, Jain D, Vira S, Diebo BG, Line B, Sciubba DM, Protopsaltis TS, Buckland AJ, Errico TJ, Lafage V, Bess S, Passias PG.

Spine J. 2018 Jul;18(7):1204-1210. doi: 10.1016/j.spinee.2017.11.015. Epub 2017 Nov 16.


Sagittal Pelvic Orientation A Comparison of Two Methods of Measurement.

Buckland A, DelSole E, George S, Vira S, Lafage V, Errico T, Vigdorchik J.

Bull Hosp Jt Dis (2013). 2017 Dec;75(4):234-240.


Predictors of Hospital Length of Stay and 30-Day Readmission in Cervical Spondylotic Myelopathy Patients: An Analysis of 3057 Patients Using the ACS-NSQIP Database.

Passias PG, Jalai CM, Worley N, Vira S, Hasan S, Horn SR, Segreto FA, Bortz CA, White AP, Gerling M, LaFage V, Errico T.

World Neurosurg. 2018 Feb;110:e450-e458. doi: 10.1016/j.wneu.2017.11.009. Epub 2017 Nov 14.


Traumatic Fractures of the Cervical Spine: Analysis of Changes in Incidence, Cause, Concurrent Injuries, and Complications Among 488,262 Patients from 2005 to 2013.

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.

World Neurosurg. 2018 Feb;110:e427-e437. doi: 10.1016/j.wneu.2017.11.011. Epub 2017 Nov 11.


Declining usage of rhBMP-2 in lumbar fusions for adult spinal deformity since 2008.

Poorman G, Sure A, Jalai CM, Vira S, Horn SR, Diebo B, Bess S, Lafage V, Passias P.

J Clin Neurosci. 2018 Jan;47:62-65. doi: 10.1016/j.jocn.2017.10.065. Epub 2017 Oct 31. Review. No abstract available.


Recovery Kinetics of Radiographic and Implant-Related Revision Patients Following Adult Spinal Deformity Surgery.

Passias PG, Jalai CM, Lafage V, Poorman GW, Vira S, Horn SR, Scheer JK, Hamilton DK, Line BG, Bess S, Schwab FJ, Ames CP, Burton DC, Hart RA, Klineberg EO.

Neurosurgery. 2018 Oct 1;83(4):700-708. doi: 10.1093/neuros/nyx490.


Incidence of Congenital Spinal Abnormalities Among Pediatric Patients and Their Association With Scoliosis and Systemic Anomalies.

Passias PG, Poorman GW, Jalai CM, Diebo BG, Vira S, Horn SR, Baker JF, Shenoy K, Hasan S, Buza J, Bronson W, Paul JC, Kaye I, Foster NA, Cassilly RT, Oren JH, Moskovich R, Line B, Oh C, Bess S, LaFage V, Errico TJ.

J Pediatr Orthop. 2017 Oct 9. doi: 10.1097/BPO.0000000000001066. [Epub ahead of print]


Two-Year Results of the Prospective Spine Treatment Outcomes Study: Analysis of Postoperative Clinical Outcomes Between Patients with and without a History of Previous Cervical Spine Surgery.

Radcliff K, Jalai C, Vira S, Yang S, Boniello AJ, Bianco K, Oh C, Gerling M, Poorman G, Horn SR, Buza JA 3rd, Isaacs RE, Vaccaro AR, Passias PG.

World Neurosurg. 2018 Jan;109:e144-e149. doi: 10.1016/j.wneu.2017.09.122. Epub 2017 Sep 27.


Adult Spinal Deformity: National Trends in the Presentation, Treatment, and Perioperative Outcomes From 2003 to 2010.

Passias PG, Jalai CM, Worley N, Vira S, Marascalchi B, McClelland S 3rd, Lafage V, Errico TJ.

Spine Deform. 2017 Sep;5(5):342-350. doi: 10.1016/j.jspd.2017.02.002.


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.

Worley N, Buza J, Jalai CM, Poorman GW, Day LM, Vira S, McClelland S 3rd, Lafage V, Passias PG.

Int J Spine Surg. 2017 Apr 3;11:10. doi: 10.14444/4010. eCollection 2017.


Novel Angular Measures of Cervical Deformity Account for Upper Cervical Compensation and Sagittal Alignment.

Protopsaltis TS, Lafage R, Vira S, Sciubba D, Soroceanu A, Hamilton K, Smith J, Passias PG, Mundis G, Hart R, Schwab F, Klineberg E, Shaffrey C, Lafage V, Ames C; International Spine Study Group.

Clin Spine Surg. 2017 Aug;30(7):E959-E967. doi: 10.1097/BSD.0000000000000554.


Patient-Reported Outcome Metrics in Total Joint Arthroplasty.

Rana A, Vira S.

Instr Course Lect. 2017 Feb 15;66:647-652.


Congenital Etiology is an Independent Risk Factor for Complications in Adolescents Undergoing Corrective Scoliosis Surgery: Comparison of In-hospital Comorbidities Using Nationwide KID's Inpatient Database.

Poorman GW, Jalai CM, Diebo B, Vira S, Buza J, Baker 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.

J Pediatr Orthop. 2017 Apr 24. doi: 10.1097/BPO.0000000000000990. [Epub ahead of print]


Defining the Role of the Lower Limbs in Compensating for Sagittal Malalignment.

Lafage R, Liabaud B, Diebo BG, Oren JH, Vira S, Pesenti S, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V.

Spine (Phila Pa 1976). 2017 Nov 15;42(22):E1282-E1288. doi: 10.1097/BRS.0000000000002157.


Morbidity of Adult Spinal Deformity Surgery in Elderly Has Declined Over Time.

Passias PG, Poorman GW, Jalai CM, Neuman B, de la Garza-Ramos R, Miller E, Jain A, Sciubba D, McClelland S, Day L, Ramchandran S, Vira S, Diebo B, Isaacs E, Bono O, Bess S, Gerling M, Lafage V.

Spine (Phila Pa 1976). 2017 Aug 15;42(16):E978-E982. doi: 10.1097/BRS.0000000000002009.


Juvenile Particulate Osteochondral Allograft for Treatment of Osteochondral Lesions of the Talus: Detection of Altered Repair Tissue Biochemical Composition Using 7 Tesla MRI and T2 Mapping.

Vira S, Ramme AJ, Chapman C, Xia D, Regatte RR, Chang G.

J Foot Ankle Surg. 2017 Jan - Feb;56(1):26-29. doi: 10.1053/j.jfas.2016.09.012.


Full-Body Analysis of Age-Adjusted Alignment in Adult Spinal Deformity Patients and Lower-Limb Compensation.

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.

Spine (Phila Pa 1976). 2017 May 1;42(9):653-661. doi: 10.1097/BRS.0000000000001863.


Is There a Gender-Specific Full Body Sagittal Profile for Different Spinopelvic Relationships? A Study on Propensity-Matched Cohorts.

Vira S, Diebo BG, Spiegel MA, Liabaud B, Henry JK, Oren JH, Lafage R, Tanzi EM, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V.

Spine Deform. 2016 Mar;4(2):104-111. doi: 10.1016/j.jspd.2015.08.004. Epub 2016 Feb 2.


Reoperation Rates After Long Posterior Spinal Fusion: Use of Recombinant Bone Morphogenetic Protein in Idiopathic and Non-idiopathic Scoliosis.

Paul JC, Lonner BS, Vira S, Kaye ID, Errico TJ.

Spine Deform. 2016 Jul;4(4):304-309. doi: 10.1016/j.jspd.2015.12.003. Epub 2016 Jun 16.


Patient-specific Hip Fracture Strength Assessment with Microstructural MR Imaging-based Finite Element Modeling.

Rajapakse CS, Hotca A, Newman BT, Ramme A, Vira S, Kobe EA, Miller R, Honig S, Chang G.

Radiology. 2017 Jun;283(3):854-861. doi: 10.1148/radiol.2016160874. Epub 2016 Dec 2.


The impact of obesity on compensatory mechanisms in response to progressive sagittal malalignment.

Jalai CM, Diebo BG, Cruz DL, Poorman GW, Vira S, Buckland AJ, Lafage R, Bess S, Errico TJ, Lafage V, Passias PG.

Spine J. 2017 May;17(5):681-688. doi: 10.1016/j.spinee.2016.11.016. Epub 2016 Dec 1.


The Interobserver and Intraobserver Reliability of the Sanders Classification Versus the Risser Stage.

Vira S, Husain Q, Jalai C, Paul J, Poorman GW, Poorman C, Yoon RS, Looze C, Lonner B, Passias PG.

J Pediatr Orthop. 2017 Jun;37(4):e246-e249. doi: 10.1097/BPO.0000000000000891.


Three-dimensional reconstruction using stereoradiography for evaluating adult spinal deformity: a reproducibility study.

Ferrero E, Lafage R, Vira S, Rohan PY, Oren J, Delsole E, Guigui P, Schwab F, Lafage V, Skalli W.

Eur Spine J. 2017 Aug;26(8):2112-2120. doi: 10.1007/s00586-016-4833-5. Epub 2016 Nov 5.


Analysis of an unexplored group of sagittal deformity patients: low pelvic tilt despite positive sagittal malalignment.

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; International Spine Study Group.

Eur Spine J. 2016 Nov;25(11):3568-3576. Epub 2015 May 31.


Does Reoperation Risk Vary for Different Types of Pediatric Scoliosis?

Paul JC, Lonner BS, Vira S, Feldman D, Errico TJ.

J Pediatr Orthop. 2018 Oct;38(9):459-464. doi: 10.1097/BPO.0000000000000850.


Duplex Ultrasonography Has Limited Utility in Detection of Postoperative DVT After Primary Total Joint Arthroplasty.

Vira S, Ramme AJ, Alaia MJ, Steiger D, Vigdorchik JM, Jaffe F.

HSS J. 2016 Jul;12(2):132-6. doi: 10.1007/s11420-015-9476-2. Epub 2016 Feb 12.


Calcaneonavicular Coalition with Naviculocuneiform and Cuneiform-First Metatarsal Coalitions A Case Report.

Vira S, McCormack R, Felder G, Otsuka N.

Bull Hosp Jt Dis (2013). 2016 Jun;74(2):165-7.


Global sagittal axis: a step toward full-body assessment of sagittal plane deformity in the human body.

Diebo BG, Oren JH, Challier V, Lafage R, Ferrero E, Liu S, Vira S, Spiegel MA, Harris BY, Liabaud B, Henry JK, Errico TJ, Schwab FJ, Lafage V.

J Neurosurg Spine. 2016 Oct;25(4):494-499. Epub 2016 May 20.


Predicting Cervical Alignment Required to Maintain Horizontal Gaze Based on Global Spinal Alignment.

Diebo BG, Challier V, Henry JK, Oren JH, Spiegel MA, Vira S, Tanzi EM, Liabaud B, Lafage R, Protopsaltis TS, Errico TJ, Schwab FJ, Lafage V.

Spine (Phila Pa 1976). 2016 Dec 1;41(23):1795-1800.


Blast shockwaves propagate Ca(2+) activity via purinergic astrocyte networks in human central nervous system cells.

Ravin R, Blank PS, Busse B, Ravin N, Vira S, Bezrukov L, Waters H, Guerrero-Cazares H, Quinones-Hinojosa A, Lee PR, Fields RD, Bezrukov SM, Zimmerberg J.

Sci Rep. 2016 May 10;6:25713. doi: 10.1038/srep25713.


Variability Over Time of Preoperative Sagittal Alignment Parameters: Radiographic and Clinical Considerations.

Menga EN, Spiegel MA, Vira S, Lafage R, Henry JK, Liabaud B, Oren JH, Worley N, Schwab FJ, Errico TJ, Lafage V, Protopsaltis TS.

Spine (Phila Pa 1976). 2016 Dec 15;41(24):1896-1902.


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