Abstract
An 86-year-old woman had repeat episodes of choledocholithiasis. A straight endoscopic retrograde biliary drainage (ERBD) tube was inserted into the bile duct. Twenty-nine days later, she developed abdominal pain and peritonitis. The findings on CT included intra-abdominal free air, ascites, and evidence that the ERBD tube had migrated to the sigmoid colon that had a diverticulum. Emergency surgery was done. Intra-operative findings included a diverticular perforation of the sigmoid colon by an ERBD tube ; Hartmann's operation was performed. The patient's postoperative course was uneventful, and the patient was discharged 31 days after surgery. Although the majority of migrated biliary endoprostheses pass through the intestine without causing any problems, intestinal perforation can occur in patients with a diverticulum. Careful diagnosis is required to identify migrating biliary endoprostheses.
