Anal Intraepithelial Neoplasia 3

**Semantic type:** Neoplastic Process

**Definition:** Anal canal or perianal skin intraepithelial neoplasia with severe dysplasia.

**Synonyms:** - AIN III - AIN3 - Anal Squamous Intraepithelial Neoplasia 3 - Anal intraepithelial neoplasia, grade III