Method :Three patients suffering from membranous choanal atresia due to radiotherapy of nasopharyngeal carcinoma (NPC) were treated by microwave under nasal endoscope.

• 方法：采用鼻内窥镜下微波手术，对3例鼻咽癌放疗后后鼻孔膜性闭锁的患者进行治疗。