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Sphincter of the hepatopancreatic ampulla (Oddi): A morphological study

The precise morphology of the human sphincter of Oddi was investigated. Anatomic samples, including the terminal portion of the bile duct and main pancreatic ducts, the major duodenal papilla, and the periampullary duodenal wall, were removed from 22 cadavers of various ages of patients who had died without any history of biliary or pancreatic disease.