Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . No pleural abnormality is seen . The hilar and mediastinal silhouettes are unremarkable . There is subtle cortical irregularity at right lateral ninth rib with callus , which may represent a subacute fracture .
    OUTPUT:
    
Likely fracture at the right lateral ninth rib with callus . If clinically indicated , dedicated rib series would be helpful . No pneumothorax or pleural effusion .