Lacrimal sac mass

Lacrimal sac masses are very uncommon and more commonly have a malignant (~80%) rather than benign (~20%) etiology.

inflammatory
neoplastic
- epithelial tumors
  - benign, e.g. papilloma
  - malignant, e.g. squamous cell carcinoma, transitional cell carcinoma, adenocarcinoma
- mesenchymal tumor, e.g. fibroma
- lymphoma
- malignant melanoma