Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is widening of the mediastinum . There is extensive subcutaneous emphysema in the soft tissues of the right neck . Opacity of the left hemithorax is consistent with large pleural effusion . Right apical pneumothorax is better seen on concurrent CT of the torso .
    OUTPUT:
    
1 . Mediastinal widening consistent with traumatic aortic and large posterior mediastinal hematoma injury seen on concurrent CT . 2 . Right - sided pneumothorax is better seen on concurrent CT of the torso . 3 . Opacity of the left hemi thorax is consistent with large pleural effusion . 4 . Extensive subcutaneous emphysema within the soft tissues of the right neck .