CTICasesPneumocystis jirovecii Pneumonia (PJP)
Imaging findings
Chest CT in an immunocompromised patient presenting with an AIDS-defining illness demonstrates symmetric, diffuse ground-glass opacities, mild septal reticulation, and early architectural distortion. Notably absent are smooth interlobular septal thickening, pleural effusion, and significant peribronchial cuffing.
Key takeaways
Pneumocystis jirovecii pneumonia typically presents with diffuse, bilateral, symmetric ground-glass opacities, often with a perihilar or upper-lobe predominance. Recognizing the absence of pleural effusions and signs of fluid overload helps confidently differentiate PJP from congestive heart failure in immunocompromised patients.
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