Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pigtail catheter is in - situ in the right upper chest , unchanged in location . There is a small to moderate - sized pneumothorax , this has increased slightly in size compared to the earlier study . Extensive subcutaneous emphysema is again noted . The left lung remains clear . The cardiomediastinal contour is unchanged . Mild atelectasis at the left lung base .
    OUTPUT:
    
Slight interval increase in the right - sided pneumothorax , the chest tube is unchanged in location .