CTICasesGastrobronchial Fistula post-Gastric Bypass
Imaging findings
CT shows a defect near the gastroesophageal anastomosis post-gastric bypass, with a fistulous tract extending superiorly through the diaphragm into the right lower lobe, causing a focal cavitating consolidation/pneumonitis.
Key takeaways
Gastrobronchial fistula is a rare but serious complication of gastric bypass surgery. It occurs when a leak at the anastomosis tracks through the diaphragm into the lung parenchyma, presenting with chronic productive cough, fever, or recurrent pneumonia.
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