Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a background of severe emphysema . Right pigtail catheter pleural drain projects over the right base . There is increased subcutaneous gas along the right chest wall . There is no evidence of residual pneumothorax or pleural effusion . Heart size remains normal .
    OUTPUT:
    
No evidence of residual pneumothorax . Increased subcutaneous gas along the right chest wall .