Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a small right apical pneumothorax . Note is made of acute displaced right posterior third and fourth rib fractures , better characterized by the CT performed on the previous day . No new fractures are identified . Heart size is normal . The hilar and mediastinal contours are normal . Note is made of mild bibasilar atelectasis , otherwise the lungs are clear . There is a small right pleural effusion .
    OUTPUT:
    
Stable small right apical pneumothorax . Stable displaced right ___ and ___ rib fractures . No new fracture .