Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pneumomediastinum is demonstrated along with air dissecting into the soft tissues of the neck , similar to the prior study . Cardiac , mediastinal and hilar contours are otherwise unremarkable . Heart size is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . The pulmonary vascularity is normal . There are no acute osseous abnormalities .
    OUTPUT:
    
Pneumomediastinum with subcutaneous gas in the neck , similar to the prior exam from 2 hours ago .