Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable , with mild enlargement of the cardiac silhouette . There is a mild increase in the moderate - sized right pleural effusion , with decreased aeration of the right lower lobe . Heterogeneous opacification in the retrocardiac left lung base , likely represents atelectasis . No new consolidation is detected . Mild pulmonary vascular congestion persists .
    OUTPUT:
    
Mild increase in the right pleural effusion and right basal atelectasis . Stable left basal atelectasis .