Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an increase in the right pleural effusion . There is no left pleural effusion and the left lung is grossly clear . The left cardiomediastinal and hilar border is stable . The previously mentioned widening of the mediastinum at the level of the azygos vein is difficult to appreciate on this study .
    OUTPUT:
    
Large increase in right pleural effusion .