Loculated pleural effusion causing pseudomass
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Right midzone opacity is consistent with pleural fluid loculated in the major fissure. Cardiomegaly, pulmonary venous congestion and diffuse groundglass/interstitial opacities consistent with pulmonary oedema. No focal consolidation. Sternotomy wires and mediastinal surgical clips.
Loculated pleural fluid in a fissure can mimic a pulmonary mass and hence is sometimes referred to as a pseudomass or pseudotumour.