High density mass and the expansion of the lacrimal sac and nasolacrimal duct were observed in four CT pictures of neoplasia.

• 9例外伤后泪道阻塞CT显示：泪囊区软组织增厚，泪囊扩张或密度增高，泪囊区异常骨碎片影，鼻泪管骨折和阻塞。