| umls-concept:C0028872 | skos:definition | MSH: The sphincter of the hepatopancreatic ampulla within the duodenal papilla. The COMMON BILE DUCT and main pancreatic duct pass through this sphincter.,NCI: The muscle fibres around the opening of the common bile duct (ductus choledochus) into the duodenum at the papilla of Vater. | lld:umls |
