Method: To analyse eleven cases with cerebrospinal fluid rhinorrhea, pituitary tumor, encephalomeningocele, sphenoid sinus cyst and ethmoid sinus tumor, were analyzed from 1998 to 2004 and beening followed up for 6 months to 6 years.

• 方法：分析我科1998年~2004年间经鼻内镜手术治疗脑脊液鼻漏、垂体瘤、鼻内脑膜脑膨出、蝶窦囊肿、筛窦癌等，资料完整、随访时间为6个月~6年的病历11例。