Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large right pleural effusion has substantially increased in size since ___ postthoracentesis radiograph and is associated with adjacent atelectasis involving the right lower lobe to a greater degree than the right middle lobe . Left lung and pleural surfaces are clear .
    OUTPUT:
    
Increase in size of large right pleural effusion with adjacent atelectasis .