Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . There has been interval removal of a right - sided chest tube with subcutaneous gas seen in the right axilla , as before . A small right apical pneumothorax persists and is minimally decreased in size from the prior examination . The left lung is clear . There are no pleural effusions .
    OUTPUT:
    
Right apical pneumothorax is minimally decreased in size from the prior examination .