Lacrimal Drainage System Inverted Papilloma

**Semantic type:** Neoplastic Process

**Definition:** A benign neoplasm that arises from the lacrimal drainage system, usually the lacrimal sac, and consists of inward growing papillae that originate in the surface epithelium and are surrounded by an intact basement membrane.

**Synonyms:** - Inverted Papilloma of the Lacrimal Drainage System