label: Ampulla of Vater Mixed Adenoneuroendocrine Carcinoma
label_lc: ampulla of vater mixed adenoneuroendocrine carcinoma
description: A carcinoma that arises from the ampulla of Vater and the periampullary region. It is characterized by the presence of a malignant glandular epithelial component and a malignant neuroendocrine component.  At least 30 percent of either component should be present for the diagnosis to be made.