Stage III Rectal Neuroendocrine Tumor AJCC v9

**Semantic type:** Neoplastic Process

**Definition:** Stage III includes: IIIA: T4, N0, M0; IIIB: Any T, N1, M0. T4: Tumor invades the visceral peritoneum (serosa), or other organs or adjacent structures. N0: No involvement of regional lymph node(s). N1: Tumor involvement of regional lymph node(s). M0: No distant metastasis. (AJCC 9th ed.)