ampulla of vater adenosquamous carcinoma (Monarch Disease Ontology id MONDO_0003553) is a carcinoma with glandular and squamous differentiation arising from the ampulla of Vater. Signs and symptoms include jaundice, abdominal pain, anorexia, nausea, vomiting, and weight loss. Also known as: ampulla of Vater adenosquamous carcinoma, hepatopancreatic ampulla adenosquamous carcinoma.