Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overall stable prominent subcutaneous emphysema in the right chest wall and the small right apical pneumothorax . No evidence of tension . Stable hyperinflation of the lungs is consistent with emphysema . Slight increase in the size of the small left pleural effusion . Increased bibasilar atelectasis . Stable cardiomediastinal silhouette and hila . The right pigtail catheter appears unchanged in position .
    OUTPUT:
    
1 . Stable small right apical pneumothorax without evidence of tension . 2 . Stable prominent right chest wall subcutaneous emphysema . 3 . Slightly increased small left pleural effusion and bibasilar atelectasis . 4 . COPD