CTICasesLegionella micdadei Pneumonia
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Imaging findings
Chest CT in a renal transplant recipient demonstrates a dense, compact nodular consolidation in the right lung apex with a surrounding ground-glass halo, mimicking an angioinvasive fungal infection (such as aspergillosis) or nocardiosis.
Key takeaways
Legionella micdadei is an opportunistic pathogen in immunocompromised patients, particularly solid organ transplant recipients. It is famous for presenting as a rapidly progressive, nodular or "round" pneumonia that radiographically mimics fungal infection or nocardiosis but can be distinguished clinically by its much faster rate of growth.
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