Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and clear . No pleural effusion or pneumothorax . The heart is top - normal in size . Mediastinal contour , and hila are unremarkable . Aortic arch calcifications are present . Limited assessment of the osseous structures demonstrate a subtle cortical step - off along the anterolateral right seventh rib .
    OUTPUT:
    
1 . Minimally displaced right seventh anterolateral rib fracture . 2 . No pneumothorax .