CTICasesInfected Excluded Aneurysm Sac
Imaging findings
Chest radiograph showed soft tissue outside a stented descending aorta with suspicious air lucencies. CT confirmed air within the excluded aneurysm sac, suggesting an aortoesophageal fistula, though a fluoroscopic esophogram was negative for extravasation.
Key takeaways
Even with negative fluoroscopy, the presence of air in an excluded aneurysm sac is highly suspicious for infection and possible fistula. Management may involve lifelong antibiotics if surgery is high-risk.
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