CTICasesInfected Intralobar Sequestration
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Imaging findings
The patient presented with a retrocardiac lesion containing a crescent of air. CT imaging revealed an infected intralobar sequestration with a demonstrable systemic feeding vessel from the aorta and adjacent inflamed, atelectatic lung tissue.
Key takeaways
An infected sequestration should be high on the differential for a persistent, infected-appearing lesion in the lower lobes, especially when air-fluid levels or internal cavitation are present. Identifying the systemic feeding vessel is key to the diagnosis.
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