CTICasesSeptic Emboli with Mycotic Pseudoaneurysm
Imaging findings
Chest CT in a patient with Staphylococcus aureus endocarditis reveals multifocal, bilateral, subpleural consolidations, wedge-shaped opacities, and pleural fluid consistent with septic emboli. Additionally, there is a focal aneurysmal dilation of a distal pulmonary artery branch, representing a mycotic pseudoaneurysm.
Key takeaways
Mycotic pseudoaneurysms of the pulmonary artery are rare, life-threatening complications of infective endocarditis or septic embolization. They can be treated with antibiotic therapy, endovascular embolization, or surgical resection, and occasionally demonstrate resolution or scarring on follow-up imaging once the underlying infection is controlled.
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