後天性外耳道閉塞症の2症例

ACQUIRED ATRESIA OF THE EXTERNAL EAR CANAL

Ⅰ．緒言

　外耳道の閉塞は先天性の奇形として見られるほかに後天性の種々の原因で起こりうる。

　われわれは最近，炎症および外傷によって生じた外耳道閉塞症の2症例を経験したので若干の考察を加えて報告する。

　Two cases of acquired atresia of the ear canal are reported. The first case was caused by erysipelas and the tympanic cavity was also severely damaged. In the second case due to head trauma the tympanic membrane was not involved.

　In both cases membranous atresia was observed in the cartilage portion and cholesteatoma-like accumulation was found in the inner part of the obstruction.

　The occluded portions were resected surgically and the ear canals remained dry and open after one year postoperatively.

　The clinical significance of the acquired atresia of the ear canal is discussed.