title: Spinal column deformity and instability after lumbar or thoracolumbar laminectomy for intraspinal tumors in children and young adults.
abstract: METHODS
  A retrospective study about the occurrence of spinal column deformity or instability after multilevel lumbar or thoracolumbar total laminectomy for removal of benign intraspinal tumors in children and young adults.
  
  
  OBJECTIVE
  To analyze the long-term clinical and radiographic outcome of these patients, and to specify factors that affect the occurrence of postlaminectomy spinal column deformity and instability.
  
  
  BACKGROUND
  Spinal column deformity is not uncommon after multilevel cervical or thoracic laminectomies for removal of intraspinal tumors in children. Its incidence in the lumbar and thoracolumbar spine reportedly is low.
  
  
  METHODS
  Thirty-six consecutive patients (23 male, 13 female) underwent multilevel lumbar or thoracolumbar total laminectomy for removal of benign intraspinal tumors from 1966 to 1989. Twelve patients were aged 17 years or younger ("children and adolescents"; mean age, 11 years), and 24 were aged 18-30 years ("young adults"; mean age, 24 years). All patients had preoperative, immediate postoperative, and follow-up clinical and radiographic examinations.
  
  
  RESULTS
  At a mean follow-up period of 14 years (range, 4-28 years), six patients (16.6%) had spinal deformity (lordosis or thoracolumbar kyphosis associated with scoliosis), and four (11%) had spondylolisthesis. Spinal column deformity occurred in 33% of children and adolescents and in 8% of young adults. Spondylolisthesis occurred in 16.6% of children and adolescents and in 8% of young adults. Three patients had fusion for spinal column deformity. Pain was present in eight patients, and other neurologic signs and symptoms were found in 18. There was an increased incidence of postoperative spinal deformity in patients who had more than two laminae removed (P < 0.01) or a facetectomy performed at the time of the initial operation (P < 0.05). There was no association between the occurrence of the deformity and sex, neurologic condition after laminectomy, or length of follow-up period.
  
  
  CONCLUSIONS
  Spinal deformity or instability after multilevel lumbar or thoracolumbar total laminectomy is not uncommon in children and adolescents. Limiting laminae removal and facet destruction may decrease this incidence. Fusion may be required to correct post-laminectomy deformity and to stabilize the spine.
authors.affiliation: Department of Orthopedics, Mayo Clinic, Rochester, Minnesota, USA.
authors.forename: P J
authors.initials: PJ
authors.lastname: Papagelopoulos
authors.forename: H A
authors.initials: HA
authors.lastname: Peterson
authors.forename: M J
authors.initials: MJ
authors.lastname: Ebersold
authors.forename: P R
authors.initials: PR
authors.lastname: Emmanuel
authors.forename: S N
authors.initials: SN
authors.lastname: Choudhury
authors.forename: L M
authors.initials: LM
authors.lastname: Quast
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000209:etiology; D007796:Laminectomy; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D011183:Postoperative Complications; D011859:Radiography; D012086:Reoperation; D013122:Spinal Diseases / Q000209:etiology; D013125:Spinal Neoplasms / Q000601:surgery*; D013131:Spine / Q000000981:diagnostic imaging* / Q000601:surgery; D013904:Thoracic Vertebrae / Q000601:surgery*