Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right pleural pigtail catheter remains in place . There is a small right apical pneumothorax which is minimally smaller since the study performed earlier today . There is no pleural effusion . Heart size is normal . The mediastinal hilar contours are normal . The lung parenchyma is clear .
    OUTPUT:
    
Small right apical pneumothorax may be minimally smaller . Pigtail pleural drain remains in place .