Duodenal and Ampulla of Vater Neuroendocrine Tumor TNM Finding v9

**Semantic type:** Finding

**Definition:** A finding about one or more characteristics of duodenum and ampulla of Vater neuroendocrine tumors, following the rules of the TNM AJCC v9 classification system. This classification system applies to well-differentiated neuroendocrine tumors of the duodenum and ampulla of Vater. It does not apply to the following: Carcinomas of the duodenum, including neuroendocrine carcinoma and mixed adenocarcinoma-neuroendocrine carcinoma; carcinomas of the ampulla of Vater, including neuroendocrine carcinoma and mixed adenocarcinoma-neuroendocrine carcinoma; and neuroendocrine tumors of the small intestine, including jejunum and ileum. (from AJCC 9th Ed.)

**Synonyms:** - Duodenum and Ampulla of Vater Neuroendocrine Tumor TNM Finding v9