Anal Extramucosal (Perianal) Adenocarcinoma

**Semantic type:** Neoplastic Process

**Definition:** An anal adenocarcinoma arising from the lining of an anorectal fistulous tract or the anal glands. The overlying anal mucosa does not show evidence of neoplastic changes. It usually presents as a submucosal tumor.

**Synonyms:** - Extramucosal (Perianal) Adenocarcinoma of Anus - Extramucosal (Perianal) Adenocarcinoma of the Anus