Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs are obtained . Right large pleural effusion seen previously extending to the level of mid thorax appears slightly worse . Cardiomediastinal contours are stable . Dialysis catheter is unchanged . Left lung and visualized portion of the right lung are clear . No pneumothorax .
    OUTPUT:
    
Slight increase in the size of the large right pleural effusion .