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The patient was an approximately 50-year-old woman with cirrhosis of the liver non-alcoholic steatohepatitis. She underwent gallbladder surgery for calculous cholecystitis. Postcholecystectomy, her fever and inflammatory response continued. Abdominal computed tomography showed a duodenal fistula and right subphrenic abscess. Following antibiotic treatment and intravenous infusion after fasting, her symptoms gradually improved. On hospitalization day10, fluoroscopy showed duodenal fistula. We attempted endoscopic closure of the duodenal fistula using an Over-The-Scope Clip (OTSC) system, and closure was completed endoscopically and fluoroscopically. Subsequently, she steadily progressed without clinical symptoms and no exacerbation of laboratory findings.
