Ampulla of Vater Signet Ring Cell Adenocarcinoma

**Semantic type:** Neoplastic Process

**Definition:** An adenocarcinoma arising from the ampulla of Vater. Morphologically, it is characterized by the presence of mucin-containing signet-ring cells.

**Synonyms:** - Ampulla of Vater Signet Ring Cell Carcinoma - Ampulla of Vater Signet-Ring Cell Carcinoma - Ampullary Signet Ring Cell Carcinoma