Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes remain low with small left - sided pleural effusion and retrocardiac opacity . There is also mild right lower lobe opacity . Mild cardiomegaly . No overt interstitial edema . No pneumothorax . Multiple rib fractures on the left .
    OUTPUT:
    
Previously described left - sided pneumothorax is not visualized . Multiple left rib fractures and hemothorax .