Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extensive subcutaneous emphysema is new since operative chest radiograph ___ . The heart is normal in size . The hilar and mediastinal contours are within normal limits . No pneumothorax or pleural effusion is seen . Evaluation of the lung parenchyma is limited due to the underlying subcutaneous gas .
    OUTPUT:
    
Extensive subcutaneous emphysema overlying the chest . No large pneumothorax .