label: Duodenal and Ampulla of Vater Neuroendocrine Tumor pM1b TNM Finding v9
label_lc: duodenal and ampulla of vater neuroendocrine tumor pm1b tnm finding v9
description: Duodenum or ampulla of Vater neuroendocrine tumor with microscopic confirmation of metastasis in at least one extrahepatic site (e.g., lung, ovary, nonregional lymph node, peritoneum, bone). (from AJCC 9th Ed.)