Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to ___ moderate right pleural effusion and severe right basal atelectasis have worsened , obscuring multiple large lung masses and some of the extensive central adenopathy . left lung is mostly clear except for minimal basal atelectasis . The heart size is difficult to determine , though likely unchanged . There is no pneumothorax .
    OUTPUT:
    
Large right pleural effusion and severe right midlung lower lobe atelectasis increased since ___ . No pneumothorax .