title: Single and Multiple Level One Stage Posterior Hemivertebrectomy and Short Segment Fixation: Experience with 22 Cases and Comparison of Single vs. Multilevel Procedures with Minimum 2-Year Follow-Up.
abstract: METHODS
  Data of 22 patients with congenital scoliosis who underwent single stage posterior hemivertebrectomies and short segment fixation with a minimum follow-up of 2 years in our centre were studied retrospectively.
  
  
  OBJECTIVE
  To report the efficacy of posterior hemivertebrectomy in single vs multiple level hemivertebra and compare their results.
  
  
  BACKGROUND
  Single stage hemivertebrectomy is a standard procedure for single level hemivertebra. Results of multiple level hemivertebrectomies have not been reported.
  
  
  METHODS
  Twenty-two patients (9 male and 13 female) with the mean age of 11.2 years (range, 2 years 4 months to 24 years 10 months) and a mean follow up of 32 months (range, 4 to 73 months) were studied retrospectively and their results were compared.
  
  
  RESULTS
  Average number of hemivertebrae removed was 1.46 (range, 1 to 3). Mean preoperative and postoperative coronal cob angle was 48.7° (range, 22° to 80°) and 24.2° (range, 7° to 41°), respectively (p<0.001). Mean preoperative and postoperative sagittal cobb angle was 32.1° (range, 7° to 76°) and 13.6° (range, 0° to 23°), respectively (p<0.005). Mean coronal and sagittal cob correction percentage achieved was 50.2% and 51.8% respectively. Mean follow-up was 49 months (range, 30 to 84 months). Mean loss of coronal and sagittal correction at final follow-up was 4% (0% to 13.6%) degrees and 3.5% (0% to 20%), respectively.
  
  
  CONCLUSIONS
  Posterior hemivertebrectomy in congenital scoliosis is a safe treatment option for up to 3-level hemivertebrae. Excision of thoracolumbar hemivertebrae results in better correction than thoracic and lumbar hemivertebrae.
authors.affiliation: Department of Neurosciences, Park Clinic, Kolkata, India.
authors.forename: Saumyajit
authors.initials: S
authors.lastname: Basu
authors.affiliation: Department of Neurosciences, Park Clinic, Kolkata, India.
authors.forename: Agnivesh
authors.initials: A
authors.lastname: Tikoo
authors.affiliation: Department of Neurosciences, Park Clinic, Kolkata, India.
authors.forename: Farid H
authors.initials: FH
authors.lastname: Malik
authors.affiliation: Department of Neurosciences, Park Clinic, Kolkata, India.
authors.forename: Jay Deep
authors.initials: JD
authors.lastname: Ghosh
authors.affiliation: Department of Neurosciences, Park Clinic, Kolkata, India.
authors.forename: Mantu
authors.initials: M
authors.lastname: Jain
authors.affiliation: Department of Neurosciences, Park Clinic, Kolkata, India.
authors.forename: Trinanjan
authors.initials: T
authors.lastname: Sarangi
keywords: Congenital abnormalities; Kyphosis; Scoliosis; Spinal curvatures; Spine