Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are persisting small bilateral pleural effusions with overlying atelectasis , increased on the left . An underlying pneumonia can not be excluded . No pneumothorax identified . The appearance of the cardiomediastinal silhouette is unchanged including calcification of the mitral annulus .
    OUTPUT:
    
Persisting small bilateral pleural effusions with overlying atelectasis , increased in extent on the left since prior . An underlying pneumonia can not be excluded .