Carcinoma in situ of anus and anal canal

**Inclusion terms:** - Anal intraepithelial neoplasia III [AIN III] - Severe dysplasia of anus

**Excludes1:** - anal intraepithelial neoplasia I and II [AIN I and AIN II] (K62.82) - carcinoma in situ of anal margin (D04.5) - carcinoma in situ of anal skin (D04.5) - carcinoma in situ of perianal skin (D04.5)