Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is within normal limits . The mediastinal and hilar contours are normal . The previously described opacity projecting over the right middle lobe best seen on lateral view is not as apparent on the current exam . There is worsening opacity projecting over the spine on the lateral view along with a small pleural effusion that has slightly increased compared to prior exam on the left . There is no pneumothorax .
    OUTPUT:
    
Slight increase in left - sided pleural effusion with developing consolidation ; in the appropriate clinical setting may represent pneumonia .