CTICasesRapidly Progressive Legionella Pneumonia
Imaging findings
A middle-aged man with cirrhosis and a liver-kidney transplant has low-attenuation hepatic lesions from biopsy-proven diffuse B-cell PTLD. He then developed a well-circumscribed, non-segmental, round-pneumonia-like consolidation initially misread elsewhere as a cavity or abscess, which over a week progressed rapidly to bilateral patchy consolidation. Cultures grew Legionella with a positive urine antigen.
Key takeaways
Legionella pneumonia can begin as a focal, well-circumscribed round-pneumonia-like consolidation in a single lobe and then progress very rapidly over a few days to multifocal bilateral consolidation, a classic described behavior. It can be community-acquired or nosocomial, relevant here in a hospitalized immunosuppressed transplant patient, and the urine antigen aids diagnosis.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Unroofed Coronary Sinus Variant with Pulmonary Vein CommunicationCongenital
- COVID-19 Thrombotic State with Myocardial Infarction and LV ThrombusVascular
- Iatrogenic Thoracic Duct Injury with ChylothoraxIatrogenic
- Immunotherapy-Induced Organizing Pneumonia Evolving to NSIPILD
- Iatrogenic Diaphragmatic Rupture after Microwave AblationIatrogenic
- Embolizing Tumor Thrombus from Sacral ChordomaNeoplastic
- Fibrosing Mediastinitis with SVC ObstructionInflammatory
- Sarcoid-Associated Fibrosing MediastinitisAutoimmune
See all cases from December 18, 2020 →