Gastric Adenocarcinoma and Proximal Polyposis of the Stomach, also known as polyposis, gastric, is related to apc-associated polyposis conditions and familial adenomatous polyposis 1. An important gene associated with Gastric Adenocarcinoma and Proximal Polyposis of the Stomach is APC (APC Regulator Of WNT Signaling Pathway). Affiliated tissues include colon and tonsil, and related phenotypes are fundic gland polyposis and gastric adenocarcinoma