title: Acoustic schwannoma and epidermoid cyst occurring as a single cerebellopontine angle mass.
abstract: The case of a 66-year-old man with a 3-year progressive hearing loss and a homogeneous left cerebellopontine angle mass on magnetic resonance imaging scan is described. At surgery, the major portion of the mass was a typical encapsulated, solid, acoustic schwannoma, but the most rostral portion was a distinct, flaky, cystic mass without a well-defined capsule, typical of an epidermoid cyst. The radiographic and operative findings of this unique coexistence of two different benign cerebellopontine angle masses are presented.
authors.affiliation: Department of Neurosurgery, Columbia-Presbyterian Medical Center, New York, New York.
authors.forename: R R
authors.initials: RR
authors.lastname: Goodman
authors.forename: R A
authors.initials: RA
authors.lastname: Torres
authors.forename: J G
authors.initials: JG
authors.lastname: McMurtry
mesh_terms: D000368:Aged; D002526:Cerebellar Diseases / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D002528:Cerebellar Neoplasms / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D002530:Cerebellopontine Angle; D004814:Epidermal Cyst / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009464:Neuroma, Acoustic / Q000150:complications* / Q000175:diagnosis / Q000601:surgery