Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There remains subtle signs of pneumomediastinum along the left aspect of the aortic arch and left upper cardiac border . However , the extent appears possibly minimally decreased compared to the prior study . Subcutaneous emphysema is again seen at the base of the neck bilaterally and bilateral supraclavicular regions as well as projecting over the right scapula . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . Cardiac silhouette is not enlarged . Mediastinal and hilar contours are stable .
    OUTPUT:
    
Persistent pneumomediastinum , possibly minimally decreased since the prior study given differences in technique . Persistent subcutaneous emphysema , as above .