Colorectal Neuroendocrine Tumor TNM Finding v9

**Semantic type:** Finding

**Definition:** A finding about one or more characteristics of colorectal neuroendocrine tumor, following the rules of the TNM AJCC v9 classification system. This classification system applies only to well-differentiated neuroendocrine tumors of the colon and rectum (NET G1, G2, and G3). It does not apply to poorly differentiated neuroendocrine carcinomas and mixed neuroendocrine-non-neuroendocrine neoplasms (formerly mixed adenoneuroendocrine carcinomas) of the colon and rectum. (from AJCC 9th Ed.)