Preferred Label : Ampulla of Vater Neuroendocrine Tumor;
NCIt synonyms : Neuroendocrine Tumor of the Ampullary Region; Ampulla of Vater NET;
NCIt definition : A well differentiated, low, intermediate, or high grade neoplasm with neuroendocrine
differentiation that arises from the ampulla of Vater and periampullary region.;