Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased interstitial markings are stable . Cardiomediastinal contours are unchanged . No rib fracture or pneumothorax is seen . Biapical scarring is again noted . The lungs are mildly hyperinflated . A rounded density in the left retrocardiac region is likely a costochondral junction and unchanged .
    OUTPUT:
    
No evidence of fracture or pneumothorax .