CTICasesLamellar Pleural Effusion in Aortic Valve Endocarditis
Imaging findings
CT chest shows sub-pleural interstitial fluid accumulation (lamellar pleural effusion) primarily in the left lung, mimicking a free pleural effusion. Echocardiogram confirmed aortic valve endocarditis with severe aortic regurgitation.
Key takeaways
A 'lamellar' pleural effusion represents fluid accumulating in the sub-visceral pleural space (within the lung parenchyma) rather than free fluid in the pleural cavity. This atypical pattern is a manifestation of acute, severe hydrostatic pressure elevation (e.g., left ventricular failure due to aortic regurgitation).
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