Stage 0 Rectal Cancer AJCC v8

**Semantic type:** Neoplastic Process

**Definition:** Stage 0 includes: Tis, N0, M0. Tis: Carcinoma in situ, intramucosal carcinoma (involvement of lamina propria with no extension through muscularis mucosae). N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 8th ed.)

**Synonyms:** - Stage 0 Rectal Cancer