title: Intracanalicular meningioma mimicking vestibular schwannoma.
abstract: Three cases of intracanalicular meningioma mimicking vestibular schwannoma are presented. In each case, a contrast-enhancing mass filling the internal auditory canal was identified on MR images and was originally diagnosed as a vestibular schwannoma. Although it is difficult to differentiate definitively between these lesions preoperatively, imaging findings inconsistent with a diagnosis of vestibular schwannoma can be identified. Preoperative identification of intracanalicular meningiomas permits alterations in surgical planning that allow for the more complete resection of these rare tumors.
authors.affiliation: Carolina Neuroscience Institute for Skull Base Surgery, 4030 Wake Forest Road, Suite 115, Raleigh, NC 27609, USA.
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Asaoka
authors.forename: David M
authors.initials: DM
authors.lastname: Barrs
authors.forename: John H
authors.initials: JH
authors.lastname: Sampson
authors.forename: John T
authors.initials: JT
authors.lastname: McElveen
authors.forename: Debara L
authors.initials: DL
authors.lastname: Tucci
authors.forename: Takanori
authors.initials: T
authors.lastname: Fukushima
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D003937:Diagnosis, Differential; D004428:Ear Neoplasms / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008577:Meningeal Neoplasms / Q000175:diagnosis*; D008579:Meningioma / Q000175:diagnosis*; D009464:Neuroma, Acoustic / Q000175:diagnosis*
chemical_list: D003287:Contrast Media