title: Immature teratoma arising from a benign cortical abnormality.
abstract: METHODS
  The authors report the case of an immature teratoma of the left parieto-occipital region in a 13-year-old girl. The patient had a computed tomographic (CT) scan of the brain aged 10 months old, following a minor head injury. This demonstrated an abnormality in the same region, which had been reported as 'a cortical malformation'.
  
  
  METHODS
  We propose that the lesion on the original imaging is a mature teratoma or other silent dystopic germ cell element that subsequently transformed into the immature teratoma.
  
  
  CONCLUSIONS
  The potential triggers for such a transformation and the management of patients with similar incidental radiological findings are discussed.
authors.affiliation: Department of Neurological Surgery (Paediatric Division), Radcliffe Infirmary, Oxford, UK. sjhanna@lycos.co.uk
authors.forename: S J
authors.initials: SJ
authors.lastname: Hanna
authors.forename: A L
authors.initials: AL
authors.lastname: Green
authors.forename: O
authors.initials: O
authors.lastname: Ansorge
authors.forename: P
authors.initials: P
authors.lastname: Anslow
authors.forename: P G
authors.initials: PG
authors.lastname: Richards
mesh_terms: D000293:Adolescent; D001932:Brain Neoplasms / Q000473:pathology*; D002471:Cell Transformation, Neoplastic / Q000473:pathology; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D016609:Neoplasms, Second Primary / Q000473:pathology*; D013724:Teratoma / Q000473:pathology / Q000556:secondary*; D014057:Tomography, X-Ray Computed