蝸牛骨化を認めた好酸球性中耳炎の1例

A Case of Eosinophilic Otitis Media with Cochlear Ossification

I．はじめに

　好酸球性中耳炎は，膠状の耳漏と耳漏・中耳粘膜への多数の好酸球浸潤を特徴とする難治性の中耳炎である^1）。気管支，鼻・副鼻腔にも著しい好酸球の浸潤を伴い，成人発症型の気管支喘息，慢性副鼻腔炎を高率に合併する特徴をもつ。伝音性難聴から骨導閾値の悪化を伴い，聾に至る場合もある^2～4）。

　今回われわれは，気管支喘息と慢性副鼻腔炎の既往があり，両側好酸球性中耳炎に罹患し，両側聾となった症例に対して人工内耳手術を施行し，現在8年8か月経過した症例を経験したので報告する。

A 50-year-old female patient with eosinophilic otitis media presented with cochlear ossification in the ear performed mastoidectomy. She noticed sudden deafness in both ears and received mastoidectomy to treat otorrhea of the left eat in 1991. Cochlear ossification was shown by CT scan and surgery of cochlear implant was performed in the right ear in 1995. Our experience of long-term follow-up showed that cochlear implant is indicative for deafness induced by eosinophilic otitis media,and the early decision and intensive treatment of otitis media is needed before the surgery.