Anal Canal Neuroendocrine Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A neoplasm with neuroendocrine differentiation that arises from the anal canal. It includes neuroendocrine tumors (well-differentiated neuroendocrine neoplasms) and neuroendocrine carcinomas (poorly differentiated neuroendocrine neoplasms).

**Synonyms:** - Anal Neuroendocrine Neoplasm - Neuroendocrine Neoplasm of Anus - Neuroendocrine Neoplasm of the Anus