Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is stable from prior exam consistent with a least moderate cardiomegaly . Lower lobe lobe opacity best seen on the lateral radiograph . There is no pulmonary edema . There may be a trace residual right pleural effusion , smaller from prior exam . There is no left pleural effusion . There is no pneumothorax . Right chronic posterior rib deformities representing healed fractures .
    OUTPUT:
    
Left lower lobe opacity may represent pneumonia . Stable at least moderate cardiomegaly . Trace recurrent right pleural effusion or right pleural scarring .