Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left - sided chest tube has been removed with increase in the volume of subcutaneous emphysema . There is an air - fluid seen anteriorly on the lateral which is likely a small hydropneumothorax . A small amount of pneumomediastinum is also seen around the aortic knob . The remaining post operative changes in the left lung are stable . Moderate hiatal hernia is also stable .
    OUTPUT:
    
Small anterior hydropneumothorax and small pneumomediastinum likely related to recent surgery and chest tube removal .