Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: New left - sided chest tube is seen entering the left lateral thoracic wall and ending in the left upper lung region . Compared with prior exam there has been nearly complete evacuation of the left - sided pneumothorax . Small amount of subcutaneous gas is secondary to a chest tube placement . The lungs are well inflated without focal opacities . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion . No right - sided pneumothorax is present .
    OUTPUT:
    
Successful evacuation of a left - sided pneumothorax after chest tube placement .