Abstract
A 77-year-old man was admitted for investigation of right upper quadrant abdominal pain and obstructive jaundice. Magnetic resonance cholangiopancreatography suggested a small stone in the common bile duct. Endoscopic retrograde cholangiopancreatography demonstrated mild dilation of the common bile duct with a small filling defect and linear filling defect in the distal bile duct. A diagnosis of choledocholithiasis and foreign body in the common bile duct was made. Endoscopic papillary balloon dilation was performed, and a stone and foreign body were extracted from the bile duct with basket forceps. The component analysis of the foreign body showed mainly calcium and phosphorus, therefore the foreign body seemed to be a fish bone. We reported this case because an ingested foreign body in the common bile duct is rare in patients without any previous operation.
