Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a large right pleural effusion , new from prior exam with associated compressive atelectasis in the right middle lower lung . The left lung is clear aside from mild left lower lung atelectasis . Heart size difficult to assess given effacement of the right heart border . Bony structures are intact .
    OUTPUT:
    
Large right pleural effusion with compressive atelectasis in the right middle lower lung .