Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right paramediastinal mass is unchanged . Postobstructive pneumopathy in the right upper lobe is unchanged . Interval decrease in size of the right - sided pleural effusion . No residual pneumothorax . Airspace opacification in the medial aspect of the right lower lobe and left lower lobe are stable .
    OUTPUT:
    
Interval decrease in amount of right - sided pleural fluid . No residual pneumothorax .