Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Air is seen tracking within the soft tissues of the neck and within the mediastinum . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . The imaged upper abdomen is unremarkable . The bones are intact .
    OUTPUT:
    
Pneumomediastinum with air tracking into the soft tissues of the neck . No pneumothorax . Recommend clinical correlation for injury to the hypopharynx and for the presence of infection .