Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , there has been interval increase of a right pneumothorax . Right pericardial tube is unchanged in position . The left lung is clear . Right perihilar and upper lobe opacity is essentially stable . The left lung is grossly clear . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Increase in right pneumothorax .