Fig. 5From: Todani type III: like biliary dilatation with duodenal prolapse—a case reportThis is a schematic illustration of the possible cause of the patient’s disease. The inflow of pancreatic juice into the bile duct causes the pressure in the dile duct to increase. The long-term sustained high pressure causes the bile duct to herniate into the duodenum through the Oddi sphincterBack to article page