Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Re - demonstrated is extensive subcutaneous emphysema over the left chest wall and neck . The 2 left chest tubes are present and unchanged . There is stable appearance of the small left pneumothorax without evidence of tension . Mild left basilar atelectasis . The size and appearance of the cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
No significant interval change since the prior study .