Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest when compared to prior study demonstrates increase in lung volumes with development of moderate left pleural effusion . The rounded opacity in the left middle lung corresponds to the mass seen on recent PET - CT from ___ . The remainder of the left and right lung is clear . The cardiac and mediastinal contours are normal . No pneumothorax is appreciated .
    OUTPUT:
    
Interval improvement in lung volumes with development of moderate left pleural effusion . No evidence of acute pneumonia .