CTICasesLegionella pneumophila Pneumonia
Imaging findings
CT chest shows localized ground-glass opacities with nodular components in the right upper lobe and peripheral consolidation in the right lung base in a patient with a history of hairy cell leukemia. Sputum/BAL culture confirmed Legionella pneumophila.
Key takeaways
Legionella pneumophila pneumonia typically presents as a lobar or segmental consolidation that can rapidly progress. In immunocompromised individuals (e.g., hairy cell leukemia), it may manifest with atypical features like nodular ground-glass opacities and peripheral consolidations, mimicking viral or fungal infections.
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