Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion is identified . There may be trace left basal atelectasis . No pneumothorax is identified . Multiple left - sided rib fractures are identified involving ribs 5 through 8 on the left appear acute to subacute . A healing fracture of the left clavicle is noted .
    OUTPUT:
    
Multiple left - sided rib fractures involving ribs 5 through 8 appear acute to subacute . No evidence of left - sided pneumothorax .