Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of a right chest tube . Again seen is decreased volume of the right lung . Also seen is a small right apical pneumothorax , which is unchanged in size . There is significant atelectasis of the base of the right lung and gas in the soft tissues of the right chest . The left lung is normal appearing the heart is mildly enlarged .
    OUTPUT:
    
Small right apical pneumothorax , unchanged in size from the prior study . No evidence of tension .