2020–2021 BCSC Basic and Clinical Science Course™
4 Ophthalmic Pathology and Intraocular Tumors
Part I: Ophthalmic Pathology
Chapter 14: Orbit and Lacrimal Drainage System
Lacrimal Sac Neoplasia
Lacrimal sac neoplasms are rare and may mimic dacryocystitis clinically. In one study of patients undergoing dacryocystorhinostomy (DCR) for chronic nasolacrimal duct obstruction, neoplasm was the cause in only 5% of cases. As the lacrimal sac is lined with a transitional epithelium, similar to that in the bladder, squamous and transitional cell carcinomas may arise in the sac, though rarely. Most lacrimal sac tumors are benign papillomatous neoplasms that arise from the epithelial lining, but a wide variety have been reported.
Excerpted from BCSC 2020-2021 series: Section 4 - Ophthalmic Pathology and Intraocular Tumors. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.