title: Meningioma of the internal auditory canal with extension into the vestibule.
abstract: Meningiomas account for approximately 18 to 19 per cent of all brain tumours. Although they can arise in numerous locations, meningiomas of the internal auditory canal (IAC) are rare. Most tumours that originate in the IAC are schwannomas of the VIIIth cranial nerve (acoustic neuromas). We report a case of a meningioma which appears to originate from the IAC and extends into the vestibule. The clinical findings and the radiographical features of meningiomas of the IAC are similar to those of acoustic neuromas. Pre-operative differentiation between acoustic neuromas and meningiomas of the IAC may be difficult.
authors.affiliation: Department of Otolaryngology, Tokyo Medical and Dental University, Japan. ishikawa.hns@med.tmd.ac.jp
authors.forename: N
authors.initials: N
authors.lastname: Ishikawa
authors.forename: A
authors.initials: A
authors.lastname: Komatsuzaki
authors.forename: H
authors.initials: H
authors.lastname: Tokano
mesh_terms: D003937:Diagnosis, Differential; D004428:Ear Neoplasms / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D007759:Labyrinth Diseases / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D008579:Meningioma / Q000175:diagnosis* / Q000473:pathology; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009464:Neuroma, Acoustic / Q000175:diagnosis; D014722:Vestibule, Labyrinth / Q000473:pathology