title: Endoscopic resection of intraventricular ependymal cyst presenting with psychosis.
abstract: BACKGROUND
  Intracranial ependymal cysts are rare lesions generally located in the cerebral parenchyma, juxtraventricular region, or subarachnoid space; but no case of a purely intraventricular ependymal cyst has been reported.
  
  
  METHODS
  A case of intraventricular ependymal cyst presenting with symptoms of psychosis is reported. The patient's symptoms resolved almost completely following endoscopic resection of the cyst. The embryologic basis of the development of an ependymal cyst inside the ventricle and its histologic characteristics are discussed. Possible mechanism of psychosis in this case is also discussed.
  
  
  CONCLUSIONS
  Minimally invasive techniques, as in this case, may be useful in refractory psychotic cases with cystic lesions.
authors.affiliation: Department of Neurosurgery, Hiroshima University School of Medicine, Japan.
authors.forename: B
authors.initials: B
authors.lastname: Pant
authors.forename: T
authors.initials: T
authors.lastname: Uozumi
authors.forename: T
authors.initials: T
authors.lastname: Hirohata
authors.forename: K
authors.initials: K
authors.lastname: Arita
authors.forename: K
authors.initials: K
authors.lastname: Kurisu
authors.forename: T
authors.initials: T
authors.lastname: Nakahara
authors.forename: K
authors.initials: K
authors.lastname: Inai
mesh_terms: D000328:Adult; D001927:Brain Diseases / Q000175:diagnosis / Q000601:surgery; D003560:Cysts / Q000150:complications / Q000175:diagnosis* / Q000601:surgery*; D003866:Depressive Disorder / Q000209:etiology*; D003937:Diagnosis, Differential; D004724:Endoscopy; D004805:Ependyma / Q000473:pathology* / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009493:Neurosurgery / Q000379:methods; D014057:Tomography, X-Ray Computed