Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal views of the chest . Extensive subcutaneous emphysema extends from the supraclavicular soft tissues into the neck . Large pneumomediastinum likely reflects tracheal injury in the setting of recent tracheal dilatation . No large mediastinal hematoma . Left - sided pneumothorax is small - to - moderate . No substantial pleural effusion or focal lung consolidation . Heart size is normal .
    OUTPUT:
    
Small to moderate left pneumothorax , large pneumomediastinum , and extensive subcutaneous gas extending from the supraclavicular soft tissues superiorly . Findings were communicated via phone call by Dr . ___ to Dr . ___ ___ on ___ at ___ AM .