CTICasesLegionella pneumonia mimicking angioinvasive fungal infection
Imaging findings
Chest CT in a renal transplant recipient demonstrates bilateral lung consolidations and a prominent nodular opacity surrounded by a ground-glass halo (halo sign) in the right upper lobe, mimicking an angioinvasive fungal infection or Nocardia. Sputum culture was positive for Legionella.
Key takeaways
In immunocompromised patients, Legionella pneumophila can present atypically as nodular consolidations with a surrounding ground-glass halo, mimicking angioinvasive aspergillosis. Clinicians should consider atypical bacterial pathogens in transplant recipients with rapidly progressive nodular lung lesions.
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