Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post pigtail catheter removal . The pneumothorax has appeared to resolve in the interim . The heart size is normal . The lung volumes are low , but otherwise clear . There is no pleural effusion . The hilar and mediastinal contours are unchanged .
    OUTPUT:
    
Status post pigtail catheter removal . No definite pneumothorax is seen .