腫瘍による顔面神経麻痺

Facial Palsy due to Neoplastic Lesions

　はじめに

　末梢性顔面神経麻痺のおよそ70％は完全に治癒するとされ，治癒しない麻痺の一因として腫瘍が挙げられる。一般に腫瘍による顔面神経麻痺は潜在性に発症し徐々に進行するとされるが，Bell麻痺のように突発的に発症するものや緩解と増悪を繰り返すものもあり，その経過は様々である。

　本稿では，当科で経験した腫瘍性顔面神経麻痺症例を検討し，その臨床的特徴について報告する。

Neoplasm is one of the most representative causes of facial palsy, but its entity is easily neglected. In this report clinical features of neoplastic facial palsy were discussed.

Primary intratemporal tumors consisted of con-genital cholesteatoma in the petrous apex, neuri-noma, adenoma, squamous cell carcinoma and rhab-domyosarcoma. Malignant tumors of the major salivary glands showed contiguous lesions. Metas-tatic lesions included squamous cell carcinoma from head and neck regions, adenocarcinoma of the lung and leukemia-lymphoma.

Ten out of 25 cases showed remission in its course of paralysis. Since more than half demonstrated sensorineural and/or conductive hearing loss, audiological examination is required in the case of facial palsy.