Epithelial-Myoepithelial Carcinoma of the Lacrimal Sac and Literature Review of the Lacrimal System.

After PubMed database search for any case series or reports of lacrimal system epithelial-myoepithelial carcinomas, we believe this is the first documented case originating from the lacrimal sac. Although the histopathology of this tumor is distinct, unusual location and clinical presentation may pose significant diagnostic difficulties.