Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright and lateral view of the chest . Midline sternotomy wires and mediastinal clips are noted . Retrocardiac opacity is noted concerning for a large hiatal hernia . Right lung is clear . Left lower lung atelectasis is noted . No pneumothorax . No congestion or edema . Mediastinal contour is normal . Cardiac silhouette appears grossly within normal limits . There is subtle cortical irregularity involving the left tenth post for lateral rib arch . No free air below the right hemidiaphragm .
    OUTPUT:
    
Large hiatal hernia with left basal atelectasis . Possible left tenth posterior lateral rib fracture . Please correlate clinically .