title: Rapid regrowth of an atypical choroid plexus papilloma located in the cerebellopontine angle.
abstract: Choroid plexus papilloma usually occurs in the lateral or the fourth ventricle. Primary choroid plexus papilloma of the cerebellopontine angle, as described here, is an uncommon lesion. A 42-year-old man presented with a 1-month history of dysphagia and gait unsteadiness. CT scans and MRI showed a large extra-axial tumor in the right cerebellopontine angle. Pathological study revealed that the lesion was choroid plexus papilloma. Repeat imaging conducted 1 year after the operation showed that the tumor had recurred with distinct cystic features. Pathological examination again revealed increased mitotic activity and supported a diagnosis of atypical choroid plexus papilloma.
authors.affiliation: Department of Neurosurgery, Kobe University Graduate School of Medicine, Kobe, Japan. ktanaka@hbhc.jp
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Tanaka
authors.forename: Takashi
authors.initials: T
authors.lastname: Sasayama
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Nishihara
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Sakagami
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kondoh
authors.forename: Chiho
authors.initials: C
authors.lastname: Ohbayashi
authors.forename: Eiji
authors.initials: E
authors.lastname: Kohmura
mesh_terms: D000328:Adult; D002528:Cerebellar Neoplasms / Q000556:secondary* / Q000628:therapy; D002530:Cerebellopontine Angle / Q000473:pathology*; D016545:Choroid Plexus Neoplasms / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D020288:Papilloma, Choroid Plexus / Q000473:pathology*; D011878:Radiotherapy