Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . A small right pneumothorax is increased since the 12 :50 PM study . A right - sided thoracostomy tube is unchanged in position . There has been interval removal of Swan - Ganz catheter . A left subclavian central venous catheter terminates at the cavoatrial junction . There is no pleural effusion . The heart size remains normal . The hilar and mediastinal contours are within normal limits .
    OUTPUT:
    
Interval enlargement of a small right pneumothorax . A right thoracostomy tube remains unchanged in position .