我科自１９９３年１０月以来，将液氮冷冻疗法应用在中耳癌和上颌窦癌手术中，取得了满意效果，现报道如下。１材料和方法用一只干燥热水瓶装满液氮，一个漏斗。备术中使用。７例中男６例，女１例年龄３６～６０岁；中耳癌２例，上颌窦癌５例，２例中耳癌均因左耳流血性分泌物 Our department since October 1993, the liquid nitrogen cryotherapy applied to the surgery of the middle ear and maxillary sinus cancer, and achieved satisfactory results are reported below. 1 Materials and methods A dry thermos filled with liquid nitrogen, a funnel. Used in surgery. There were 6 males and 6 females in the 7 cases, with a female aged from 36 to 60 years, 2 middle ear cancers, 5 maxillary sinus cancers and 2 middle ear cancers due to left ear bloody discharge