title: Supratentorial extraventricular WHO grade III (anaplastic) ependymoma 17 years after total removal of WHO grade II ependymoma of the fourth ventricle.
abstract: We report a WHO grade III ependymoma of the supratentorial interhemispheric fissure and grew to form a large mass with anaplastic transformation without local recurrence 17 years after the total removal of a fourth ventricular WHO grade II ependymoma. We emphasize the necessity of long-term follow-up, even in benign ependymomas.
authors.affiliation: a Department of Neurosurgery , Nishi-Kobe Medical Center , Kobe City , Japan.
authors.forename: Naoya
authors.initials: N
authors.lastname: Takeda
authors.affiliation: a Department of Neurosurgery , Nishi-Kobe Medical Center , Kobe City , Japan.
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Nishihara
authors.affiliation: a Department of Neurosurgery , Nishi-Kobe Medical Center , Kobe City , Japan.
authors.forename: Tomoaki
authors.initials: T
authors.lastname: Harada
authors.affiliation: a Department of Neurosurgery , Nishi-Kobe Medical Center , Kobe City , Japan.
authors.forename: Keiji
authors.initials: K
authors.lastname: Kidoguchi
authors.affiliation: b Department of Pathology , Nishi-Kobe Medical Center , Kobe City , Japan.
authors.forename: Kimio
authors.initials: K
authors.lastname: Hashimoto
mesh_terms: D000328:Adult; D002551:Cerebral Ventricle Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D004806:Ependymoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D005260:Female; D020546:Fourth Ventricle / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D009364:Neoplasm Recurrence, Local; D019635:Neurosurgical Procedures / Q000379:methods; D015173:Supratentorial Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*
keywords: Anaplastic transformation; CSF seeding; interhemispheric fissure; supratentorial ependymoma