CTICasesUnilateral Pulmonary Edema
Imaging findings
Chest radiograph and CT show asymmetric, right-sided interstitial and alveolar edema, presenting as septal lines, peribronchial cuffing, and patchy ground-glass consolidation primarily in the right upper lobe. Echocardiography demonstrates severe mitral valve regurgitation.
Key takeaways
Unilateral pulmonary edema is a well-known cardiac pitfall that typically involves the right upper lobe. It is caused by severe mitral regurgitation, where the regurgitant jet is directed selectively toward the orifice of the right superior pulmonary vein. This local increase in hydrostatic pressure drives fluid translocation into the right upper lobe interstitial and alveolar spaces, mimicking pneumonia.
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