Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . There is no pleural effusion or pneumothorax . The lungs are well expanded with left base atelectasis . Multiple displaced rib fractures are noted on the left posterior lateral ribs including ribs ___ . Additional rib fractures seen on concurrent CT are not well seen by radiography .
    OUTPUT:
    
Displaced fractures of left posterior lateral ribs 5 through 8 with left lower lobe atelectasis , pulmonary contusion not excluded . No pneumothorax seen .