Monarch Disease Ontology term MONDO_0002736 (ampulla of vater mucinous adenocarcinoma) is a carcinoma with glandular differentiation arising from the ampulla of Vater. Morphologically, it is characterized by the presence of mucoid stroma formation. Also known as: ampulla of Vater mucinous adenocarcinoma, hepatopancreatic ampulla mucinous adenocarcinoma.