Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left base opacity , partially representing combination of atelectasis and pleural effusion is similar in extent the possibly is minimally increased . Underlying consolidation is difficult to exclude . There may also be a very trace right pleural effusion . The cardiac silhouette is markedly enlarged . Mediastinal contours are unremarkable . Right - sided pacer wires are re - demonstrated .
    OUTPUT:
    
Left basilar opacity grossly stable to possibly minimally increased , representing combination of pleural effusion and atelectasis , underlying consolidation difficult to exclude . Probable very trace right pleural effusion . Significant enlargement of the cardiac silhouette .