Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval increase in right base opacity representing increased pleural effusion with overlying atelectasis , underlying consolidation not excluded . There is now a small left pleural effusion . Cardiac silhouette is not accurately assessed due to the large right base opacity , but likely remains enlarged . Mediastinal contours are grossly stable .
    OUTPUT:
    
Interval increase in large right pleural effusion , underlying consolidation not excluded . New / increased small left pleural effusion . Cardiac silhouette size difficult to accurately assess due to the right base opacity , but likely remains enlarged .