Malignant Nasolacrimal Duct Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A primary or metastatic malignant neoplasm affecting the lacrimal duct.

**Synonyms:** - Malignant Lacrimal Duct Neoplasm - Malignant Lacrimal Duct Tumor - Malignant Neoplasm of Lacrimal Duct - Malignant Neoplasm of the Lacrimal Duct - Malignant Tumor of Lacrimal Duct - Malignant Tumor of the Lacrimal Duct