Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right chest tube is in unchanged position . Visualized portion of the small right pneumothorax at the right lung base likely underestimates in its size . Extensive subcutaneous emphysema is unchanged . Increased interstitial markings in bilateral lung bases is probably dependent edema in a patient with severe upper lobe predominant emphysema There is no large pleural effusion . Cardiomediastinal silhouette is normal size .
    OUTPUT:
    
Visualized portion of small right basal pneumothorax is stable . Extensive subcutaneous emphysema is stable . Persistent mild bibasilar pulmonary edema .