Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were provided . There is extensive pneumomediastinum extending up into the neck and to the right supraclavicular region . The lungs are clear without focal consolidation , pleural effusion , or pneumothorax . Cardiomediastinal silhouette is normal . The bones are intact .
    OUTPUT:
    
Extensive pneumomediastinum as seen on the chest CT , extending up into the neck .