Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: On upright portable chest radiograph there is continued increased lucency of the right upper lung ; however , the pleural fold is no longer evident . There is persistent bilateral subcutaneous gas in the soft tissues of the neck as well as persistent trace pneumomedistinum at the level of the trachea . Lungs are clear . No pleural effusion . Cardiac and hilar contours are unremarkable .
    OUTPUT:
    
Equivocal findings of right pneumothorax . Persistent pneumomediastinum or subcutaneous emphysema .