Malignant Anal Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A primary or metastatic malignant neoplasm that affects the anal canal or perianal skin. Representative examples include carcinomas, lymphomas, and melanomas.

**Synonyms:** - Malignant Anal Tumor - Malignant Neoplasm of Anus - Malignant Neoplasm of the Anus - Malignant Tumor of Anus - Malignant Tumor of the Anus - Malignant neoplasm of anus, unspecified