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Computed tomography (CT) image showing a cystic lesion with multiple septa in the pancreatic head. b Endoscopic cholangiogram revealing a dilated biliary tree in which the mid common bile duct (CBD) has an extensive filling defect. c Intraductal ultrasonography (IDUS) showing a pancreatobiliary fistula. The white arrow shows the pancreatobiliary fistula. The white triangle shows the CBD. d Thick mucus plugs occluding the endoscopic nasal biliary drainage (ENBD) tube.
