Gastric Neuroendocrine Tumor TNM Finding v8

**Semantic type:** Finding

**Definition:** A finding about one or more characteristics of a gastric neuroendocrine tumor, following the rules of the TNM AJCC v8 classification system. This classification system applies to gastric "carcinoid" tumors (NET G1 and G2, and rare well-differentiated G3). Gastric high-grade neuroendocrine carcinoma and gastric mixed adenoneuroendocrine carcinoma are not included in this classification system. (from AJCC 8th Ed.)