title: Post-traumatic brain stem distortion: a case report.
abstract: BACKGROUND
  Primary traumatic brain stem injury (BSI) lesions are found most frequently in the dorsal or dorsolateral midbrain, whereas distortion of the brain stem itself is exceedingly rare.
  
  
  METHODS
  We present a 20-year-old woman with a rare brain stem injury caused by a violent motor vehicle collision. Magnetic resonance imaging at 2 months after injury revealed marked brain stem distortion with loss of the normal shape at the midbrain and pons, which were displaced anteriorly in association with the fracture of the clivus. Moreover, the medulla oblongata showed a loose winding configuration. At discharge about 5 months after injury, the Glasgow Outcome Scale was severe disability.
  
  
  CONCLUSIONS
  This BSI was caused by reciprocal actions of fracture of the clivus and the direct effect on the brain stem caused by acceleration or rotational forces.
authors.affiliation: Department of Neurosurgery, Fukushima Medical School, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Sato
authors.forename: N
authors.initials: N
authors.lastname: Kodama
authors.forename: K
authors.initials: K
authors.lastname: Yamaguchi
mesh_terms: D000063:Accidents, Traffic; D000328:Adult; D001930:Brain Injuries / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology*; D001933:Brain Stem / Q000000981:diagnostic imaging / Q000293:injuries* / Q000473:pathology*; D005260:Female; D006801:Humans; D015601:Injury Severity Score; D008279:Magnetic Resonance Imaging; D014057:Tomography, X-Ray Computed