Intraparotid facial nerve schwannoma: a report of five cases and an analysis of MR imaging results.
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.
Shimizu
Ken
K
Department of Radiology, Kansai Medical University, Moriguchi, Osaka, Japan.
Iwai
Hiroshi
H
Ikeda
Koshi
K
Sakaida
Noriko
N
Sawada
Satoshi
S
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*