Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . A small to moderate right pleural effusion is new compared to most recent study . A right lower lobe opacity has persisted since ___ may represent pneumonia . Left lung is clear . There is no left pleural effusion . Aortic and mitral valve replacement and tricuspid annuloplasty are seen . Sternotomy wires are in place . No pneumothorax . Moderate cardiomegaly is unchanged . The mediastinal and hilar contours are normal .
    OUTPUT:
    
1 . Increased right pleural effusion , now small to moderate . 2 . Right lower lobe opacity may represent pneumonia . The other opacities in the right lung have resolved .