胆嚢摘出術8年後の胆管結石の巣としての外科的クリップ移動

Surgical clip migration is a rare but important cause of delayed postcholecystectomy complications. An 83-year-old man presented 8 years after laparoscopic cholecystectomy with abdominal pain and jaundice. Imaging showed biliary dilation with a 20-mm common bile duct stone. Endoscopic retrograde cholangiopancreatography with cholangioscopy identified a migrated surgical clip serving as the nidus. Electrohydraulic lithotripsy achieved fragmentation, followed by balloon extraction and placement of a fully covered metal stent. The patient recovered uneventfully. This case highlights the need to consider clip migration in patients with late-onset biliary obstruction after cholecystectomy and supports cholangioscopy-guided lithotripsy as a definitive therapy.