title: Intraparotid facial nerve schwannoma: a report of five cases and an analysis of MR imaging results.
abstract: We present five cases of intraparotid facial nerve schwannoma. In four of the five cases, tumors arising from the main facial nerve trunk were centered just below the skull base near the stylomastoid foramen and had a small cranial extension into the lower facial nerve canal. In three cases, each tumor had higher signal intensity around the periphery on T2-weighted images (target sign). These findings may be highly suggestive of an intraparotid facial nerve schwannoma.
authors.affiliation: Department of Radiology, Kansai Medical University, Moriguchi, Osaka, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Shimizu
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Iwai
authors.forename: Koshi
authors.initials: K
authors.lastname: Ikeda
authors.forename: Noriko
authors.initials: N
authors.lastname: Sakaida
authors.forename: Satoshi
authors.initials: S
authors.lastname: Sawada
mesh_terms: D000368:Aged; D003390:Cranial Nerve Neoplasms / Q000175:diagnosis*; D005155:Facial Nerve Diseases / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000175:diagnosis*