Stage 0 Anal Cancer AJCC v8

**Semantic type:** Neoplastic Process

**Definition:** Stage 0 includes: Tis, N0, M0. Tis: High-grade squamous intraepithelial lesion (previously termed carcinoma in situ, Bowen disease, anal intraepithelial neoplasia II-III, high-grade anal intraepithelial neoplasia). N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 8th ed.)

**Synonyms:** - Stage 0 Anal Canal and Perianal (Anal Margin) Carcinoma AJCC v8 - Stage 0 Anal Cancer - Stage 0 Anal Carcinoma AJCC v8