Tumors of the lacrimal drainage system.

Tumors of the lacrimal drainage system are rare, but potentially life-threatening. They comprise a large and variable spectrum of entities grouped into three major categories of primary epithelial, primary nonepithelial and inflammatory lesions. The most common primary epithelial tumors include papilloma, squamous cell carcinoma and transitional cell carcinoma, the most frequent primary nonepithelial tumors fibrous histiocytoma, malignant lymphoma and malignant melanoma, and the most common inflammatory lesions sarcoidosis, Wegener granulomatosis and pyogenic granuloma. This review outlines the incidence, types, management and prognosis of tumors affecting the lacrimal drainage system.