Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slight interval increase in size of the left pleural effusion . Unchanged small right pleural effusion . There is mild pulmonary vascular congestion as well as a new opacity in the left upper lung zone which may reflect atelectasis or consolidation . No pneumothorax identified .
    OUTPUT:
    
Slight interval increase in size of the left pleural effusion . There is a new opacity in the left upper lung zone which may reflect atelectasis or consolidation in the proper clinical context .