Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Pulmonary vascularity is normal . No focal consolidation or pleural effusion is demonstrated . The previously noted miniscule pneumothorax on the left is not visualized on current radiograph . A left ninth posterior displaced rib fracture is revisualized . Known left twelfth rib fracture is not clearly seen on the current study . There are degenerative changes in the thoracic spine . Minimal atelectasis in the left lung base is present .
    OUTPUT:
    
Previously shown tiny pneumothorax on the left seen on CT is not visualized on the current exam . Minimal left basilar atelectasis . Displaced left posterior ninth rib fracture .