Gastropleural Fistula: A Rare Complication of a Common Procedure

Weight loss surgeries are evident to be highly beneficial in patients with morbid obesity (body mass index (BMI) ≥40.0 kg/m²) and severe obesity (BMI between 35.0 and 39.9 kg/m² with co-morbidities). While this results in significant mortality benefit, there is always the possible risk of postsurgical complications. Gastrobronchial and gastropleural fistulas are two rare, post-operative pulmonary complications associated with these surgeries. Our patient is a 54-year-old female who underwent a biliopancreatic diversion with a duodenal switch. A few weeks later, she started developing a cough, fever, and shortness of breath. Computed tomography (CT) chest showed the presence of a loculated right sided hydropneumothorax. A gastrointestinal fluoroscopic contrast study performed showed a large fistula originating from the distal end of the stomach and ending towards the right pleural cavity. The fistula was successfully closed with the endoscopic fulguration of fistulous opening with argon beam coagulation and orthoscopic clipping, resulting in complete obliteration of the fistula tract. The right-sided hydropneumothorax was initially treated conservatively with antibiotics and chest tube drains followed by video-assisted thoracoscopic decortication with chest tube placement. Gastropleural fistula formation is rare but is nonetheless a serious postoperative complication of bariatric procedures and mimics pneumonia clinically. It is, therefore, essential to obtain detailed imaging work-up to rule out fistula formation, which, in turn, can be timely treated without causing further devastating results to the patient.