Subdiaphragmatic abscess due to penetration of a duodenal ulcer successfully treated with endoscopic transgastric drainage: a case report

Background Subdiaphragmatic abscesses are sometimes caused by intraabdominal infections. We report a case of endoscopic ultrasound-guided transgastric drainage. Case presentation A 75-year-old Asian man was referred to our hospital for treatment for upper gastrointestinal bleeding. On admission, blood tests showed a marked inflammatory response, and abdominal computed tomography showed free air in the abdominal cavity and a left subdiaphragmatic abscess. Therefore, the patient was diagnosed with an intraabdominal abscess associated with a perforated duodenal ulcer. Because he did not have generalized peritonitis, fasting and antibiotic treatment were the first therapies. However, because of the strong pressure on the stomach associated with the abscess and difficulty eating, we performed endoscopic ultrasound-guided transgastric drainage. After treatment, the inflammatory response resolved, and food intake was possible. The patient’s condition remains stable. Conclusions Drainage is the basic treatment for subdiaphragmatic abscesses; however, percutaneous drainage is often anatomically difficult, and surgical drainage is common. We suggest that our success with endoscopic ultrasound-guided transgastric drainage in this patient indicates that this approach can be considered in similar cases and that it can be selected as a minimally invasive treatment method.