During external dacryocystorhinostomy, a soft tissue mass was visualized in the lacrimal sac and nasolacrimal duct incid经泪管冲洗检查，回流出许多黏液脓状物，在经诊断为左侧鼻泪管阻塞并发泪囊炎下安排病人进行泪囊鼻腔造屡术。