title: Fourth ventricular neurocytoma: case report and review of the literature.
abstract: OBJECTIVE
  Central neurocytoma is a tumour that typically occurs in young adults in close association with the lateral and third ventricles of the cerebrum.
  
  
  METHODS
  We report the unusual case of a central neurocytoma that developed in the fourth ventricle of a 59-year-old woman and metastasized to the upper cervical canal. Subtotal excision and adjuvant radiotherapy were used to treat the lesion. Microscopic evaluation, discussion of the pathologic differential diagnosis and theories of the histogenesis of the tumour are presented.
  
  
  CONCLUSIONS
  Fourth ventricular neurocytoma is rare and has only been reported twice previously. It appears most likely that this tumour arises from subependymal progenitor cell lines.
authors.affiliation: University of Toronto, Division of Neurosurgery, Hospital for Sick Children, Toronto, Ontario, Canada.
authors.forename: Douglas J
authors.initials: DJ
authors.lastname: Cook
authors.forename: Sean D
authors.initials: SD
authors.lastname: Christie
authors.forename: Robert J B
authors.initials: RJ
authors.lastname: Macaulay
authors.forename: Dorianne E
authors.initials: DE
authors.lastname: Rheaume
authors.forename: Renn O
authors.initials: RO
authors.lastname: Holness
mesh_terms: D002551:Cerebral Ventricle Neoplasms / Q000175:diagnosis* / Q000532:radiotherapy / Q000601:surgery; D002574:Cervical Vertebrae; D015174:Epidural Neoplasms / Q000175:diagnosis* / Q000532:radiotherapy / Q000601:surgery; D005260:Female; D020546:Fourth Ventricle / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009366:Neoplasm Seeding; D016609:Neoplasms, Second Primary / Q000175:diagnosis* / Q000532:radiotherapy / Q000601:surgery; D018306:Neurocytoma / Q000175:diagnosis* / Q000532:radiotherapy / Q000601:surgery; D016896:Treatment Outcome