Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the most recent prior study , there has been interval increase in size of a moderate right sided pneumothorax . Right apical and basilar chest tubes are unchanged in position . Subcutaneous emphysema persists . There remains increased opacity in the right perihilar region , unchanged . The left lung is grossly clear with a small left pleural effusion . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Interval increase in size of a moderate to large right pneumothorax with the chest tubes on water seal .