CTICasesRound pneumonia caused by Legionella mcdadei
Imaging findings
Chest radiograph and CT scan show a large, dense, well-defined round consolidation in the superior segment of the right lower lobe with air bronchograms, mimicking an angioinvasive fungal infection.
Key takeaways
Legionella mcdadei (the Pittsburgh pneumonia agent) is a well-described cause of pneumonia in immunocompromised hosts. It can present as a rapidly progressive round consolidation or nodule that simulates invasive aspergillosis.
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