CTICasesLegionella mcdadei Pneumonia
Imaging findings
Serial chest radiographs and CT show rapidly progressive, multifocal consolidation and nodules with cavitation in the upper and lower lobes of a neutropenic chemotherapy patient. The findings Mimicked invasive fungal infection (such as mucormycosis) but developed much more rapidly.
Key takeaways
Legionella mcdadei pneumonia can present in immunocompromised patients with cavitary nodules and consolidations that mimic fungal infections. Its classic feature is rapid progression and changes on imaging over 24-48 hours, which is much faster than typical fungal processes.
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