Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extensive subcutaneous emphysema is seen within the chest wall and neck . A left chest tube tip projects over the medial mid lung field . A small left pneumothorax is demonstrated , though the assessment of this is limited by the overlying extensive subcutaneous emphysema . Heart size is normal . No rightward shift of the mediastinum is demonstrated . Focal opacity within the left lung base could reflect infection or aspiration . Multiple left - sided rib fractures are re - demonstrated .
    OUTPUT:
    
Extensive subcutaneous emphysema with pneumomediastinum and small left pneumothorax . Left basilar opacity is concerning for infection or aspiration .