Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . Moderate - sized left pneumothorax is unchanged . Pneumomediastinum and emphysema involving nearly all the extrapleural planes are stable . No focal consolidation or pleural effusion . Heart size is normal and cardiomediastinal contours are unchanged . No radiopaque foreign body .
    OUTPUT:
    
Unchanged moderate left pneumothorax , pneumomediastinum , and extensive subcutaneous emphysema .