カワマタ　タカカズ   Kawamata Takakazu   川俣　貴一    所属   医学部 医学科（東京女子医科大学病院）    職種   教授・基幹分野長
論文種別	症例報告
言語種別	英語
査読の有無	査読あり
表題	Large facial nerve schwannomas without facial palsy: case reports and review of the literature
掲載誌名	正式名：Neurosurgical Review volume 略　 称：Neurosurg Rev ISSNコード：03445607
掲載区分	国外
出版社	Springer-Verlag
巻・号・頁	28(3),pp.234-238
著者・共著者	KUBOTA Yuichi, KAWAMATA Takakazu, KUBO Osami, KASUYA Hidetoshi, MURAGAKI Yoshihiro†, HORI Tomokatsu
発行年月	2005/03/08
概要	Although approximately 30% of facial nerve schwannoma cases present with no facial palsy, a large facial nerve schwannoma extending to the middle and posterior cranial fossa quite rarely presents without facial palsy. The authors encountered two patients with large facial nerve schwannoma who presented with only hearing impairment and no facial palsy. The first patient was a 64-year-old woman who presented with right auditory impairment without facial palsy. MR images demonstrated a dumbbell-shaped tumor in the cerebellopontine angle. Another patient, a 40-year-old woman, also presented with vertigo and right tinnitus without facial palsy. MR images demonstrated a huge tumor expanding into both the posterior cranial fossa and middle cranial fossa. In both cases, intraoperative findings confirmed that the tumors had grown from the facial nerve. Facial nerve schwannoma can be easily diagnosed if detailed neurological evaluations and appropriate neuroimagings are conducted. However, in spite of such huge tumoral size and expanding pattern, the facial nerve function was relatively preserved. Anatomical features of the facial schwannoma are discussed. A tumor extending to the middle and posterior cranial fossa should remind neurosurgeons to consider facial nerve schwannomas even in the absence of facial palsy.
DOI	10.1007/s10143-005-0381-x
文献番号	15754210