Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . The chest is hyperinflated . There is no pleural effusion or pneumothorax . The lungs appear clear . There is a non-displaced left anterolateral ninth rib fracture with a visible step - off , possibly acute . However , non-displaced right ninth and tenth rib fractures show callus and probably subacute or older .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease . Non-displaced left anterolateral ninth rib fracture , potentially acute .