Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , trace right apical pneumothorax persists . Right - sided chest tube is in unchanged position with its tip projecting over the right lung apex . Lung volumes remain low exaggerating bronchovascular structures . Right lung base opacities are again identified and likely reflect post - surgical changes . The cardiac silhouette is normal . There still remains a small amount of subcutaneous gas along the right neck .
    OUTPUT:
    
Trace right apical pneumothorax with small amount of subcutaneous gas in the right neck . Opacities in the right lung likely reflect post-surgical changes .