1. To report two cases of rare primary lacrimal sac tumor-one of inverted papilloma and the other of hemangiopericytoma.
   提出两例罕见的上皮性和非上皮性泪囊肿瘤报告。
2. Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
   术前造影以了解泪囊的大小和阻塞的部位，以选择最佳手术适应证。
3. Method The clinical data of 15 cases with chronic dacryocystisis accepted dacryocystorhinostomy through nasal cavity and lacrimal sac were analyzed retrospectively.
   回顾分析经鼻内窥镜下鼻腔泪囊吻合术治疗慢性泪囊炎15例的临床资料。

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