title: Three cases of benign giant cell tumor with unusual imaging features.
abstract: OBJECTIVE
  Imaging findings for giant cell tumors (GCT) of the spine displaying aggressive characteristics have not been widely reported.
  
  
  METHODS
  Patients with biopsy-proven GCT were included in the study. Three cases fulfilled these criteria.
  
  
  RESULTS
  MRI and CT demonstrated disc space involvement and vertebral body compression.
  
  
  CONCLUSIONS
  Acute fracture, subluxation, and extension through the disc space have not been previously described and, while atypical for benign lesions, may in fact be typical for GCT of the spine.
authors.affiliation: Department of Radiology, New York Medical College, Valhalla, NY 10595, USA. swangerr@wcmc.com
authors.forename: Ronald
authors.initials: R
authors.lastname: Swanger
authors.forename: Catherine
authors.initials: C
authors.lastname: Maldjian
authors.forename: Raj
authors.initials: R
authors.lastname: Murali
authors.forename: Michael
authors.initials: M
authors.lastname: Tenner