Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with a prior chest x-ray dated ___ there is now a reaccumulation of pneumothorax with left - sided pigtail chest tube overlying interface of long and pleural space and associated subsequent mild rightward mediastinal shift . The right lung appears well aerated and clear . The cardiomediastinal silhouette is normal and unchanged .
    OUTPUT:
    
Interval reaccumulation of pneumothorax and subsequent mild rightward mediastinal shift when compared to most recent study