上颌窦囊肿往往通过内窥镜于上颌窦自然开口处切除病变,但由于其位置的特殊性,再加开放上颌窦口受其周围解剖影响,如合并鼻中隔偏曲、下鼻甲肥大、中鼻甲肥大等,操作起来常有困难,有时还要行鼻中隔矫正,鼻甲骨折后再行切除钩突,扩大上颌窦口后再行上颌窦手术,增加了手术操作难 Maxillary sinus cysts often endoscopic removal of lesions in the natural opening of the maxillary sinus, but due to its particularity of location, coupled with the opening of the maxillary ostium by its surrounding anatomy, such as the deviation of nasal septum, inferior turbinate hypertrophy, turbinate hypertrophy , Etc., often difficult to operate, and sometimes nasal septum correction, nasal fracture and then remove the uncinate process, to expand maxillary sinus mouth and then maxillary sinus surgery, an increase of surgical operation difficult