Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a left - sided chest tube which terminates in the left axillary soft tissues outside of the rib cage . Small post - procedural left chest wall subcutaneous emphysema is new since the prior exam . There has been interval re-expansion of the left lung with a residual moderate left pneumothorax . All remaining support devices are in satisfactory position . Small pneumopericardium is unchanged . The right lung remains clear .
    OUTPUT:
    
Interval placement of a left - sided chest tube which terminates in the left axillary soft tissues outside of the thorax . Interval decreased size of the left pneumothorax , now moderate in size . New small post - procedural left chest wall subcutaneous emphysema .