Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ , left - sided chest tube in similar position . No pneumothorax . Small left pleural effusion tracking to the apex is stable . Left retrocardiac opacity is slightly improved . The numerous displaced left rib fractures are stable . Subcutaneous emphysema has slightly improved .
    OUTPUT:
    
No interval change in the left hemothorax and multiple left rib fractures . No pneumothorax visualized .