鼓室形成術後鼓膜が化骨した3症例

Postoperative Ossification of the Tympanic Membrane

　はじめに

　慢性中耳炎の治療として鼓室形成術が行われるようになり，今日ではその成績もきわめて向上してきた。しかし，ときには術後に十分な聴力改善が得られない症例も見受けられる。

　今回われわれは，耳手術後一時聴力が改善したにもかかわらず，その後鼓膜の化骨をきたし聴力が悪化した症例を3例経験した。

Ossification of the tympanic membrane was found in three patients after tympanoplasty. The age of the patients was under 15 years. Hearing was deteriorated in all patients several months after the surgery. CT revealed ossification of the tympanic membrane. Periosteal autograft was supposed to be the main reason of the ossifica-tion. Two patients had revision surgery and hearing was improved in one patient. Periosteal autograft is not advisable for myringoplasty in young patients.