title: A case of intradural osteosarcoma of the spine.
abstract: BACKGROUND
  Intradural-extramedullary spinal tumors and extradural osteosarcomas are both rare entities. Only one case of primary intradural-extramedullary osteosarcoma of the spine has been previously reported. This is the second reported case.
  
  
  OBJECTIVE
  To describe a case of primary intradural-extramedullary osteosarcoma of the spine associated with rapid clinical deterioration.
  
  
  METHODS
  Case report of a 70-year-old woman who presented with a constellation of neurologic symptoms.
  
  
  METHODS
  Review of patient files, radiographic studies, surgical images, histopathology, and relevant literature.
  
  
  RESULTS
  The patient underwent tumor debulking but exhibited rapid, postsurgical, functional deterioration and died within 6 weeks. This case and the only previous case of its kind both occurred in individuals with a remote history of iophendylate (Myodil) myelogram.
  
  
  CONCLUSIONS
  Primary intradural-extramedullary extraosseous osteosarcoma of the spine is an exceedingly rare entity with no established management approach. Iophendylate myelography may be implicated in the etiology of this tumor type.
authors.affiliation: Faculty of Medicine, University of New South Wales, Sydney, New South Wales 2052, Australia; Department of Neurosurgery, Prince of Wales Hospital, Sydney, New South Wales, Randwick 2031, Australia. matt@unsw.edu.au
authors.forename: Matt D
authors.initials: MD
authors.lastname: Schiller
authors.forename: Ralph J
authors.initials: RJ
authors.lastname: Mobbs
authors.forename: S Fiona
authors.initials: SF
authors.lastname: Bonar
mesh_terms: D000368:Aged; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D007796:Laminectomy; D008159:Lumbar Vertebrae / Q000473:pathology / Q000601:surgery*; D012516:Osteosarcoma / Q000473:pathology / Q000601:surgery*; D013125:Spinal Neoplasms / Q000473:pathology / Q000601:surgery*
keywords: Intradural tumors; Myelography; Osteosarcoma; Spinal tumors