Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar and mediastinal contours are within normal limits . Since the ___ examination , there has been interval slight enlargement of a small left pleural effusion . A trace right pleural effusion has also increased in size . There is adjacent compressive atelectasis . Coarse widespread interstitial markings may reflect mild insterstitial edema .
    OUTPUT:
    
Interval slight enlargement of small left and trace right pleural effusions . Mild interstitial edema .