先天性後鼻孔閉鎖症の1例

A Case of Unilateral Choanal Atresia

　はじめに

　先天性後鼻孔閉鎖症は比較的稀な疾患で，5,000〜7,000人に1人の頻度で発生するといわれている^1）。両側性閉鎖の場合は生後直後より生ずる呼吸困難症状で判明することがほとんどであるが，一側性の場合には症状が現れにくく，成人まで発見されない症例も多いとされている^2）。今回われわれは，成人女性の一側性先天性後鼻孔閉鎖症を経験したので，文献的考察を加えて報告する。

A 23-year-old woman with unilateral choanal atresia was reported. The preoperative diagnoseis was made by the radiological and fiberscopic exam-inations. Any other malformation was not observed.Transnasal endoscopic surgery was used for correc-tion of the atresia. Six weeks after operation, the opened hole of choanal atresia was closed again. At the second operation, the posterior nasal septum was removed for preventing postoperative stenosis. Using the operative endoscope and special method of removal of the posterior nasal septum, effective nasal respiration was obtained after these proce-dures.