Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a large right - sided pleural effusion , unchanged in appearance from the prior study . There is atelectasis of the right lower lobe . The cardiomediastinal silhouette and hilar contours are unchanged . There is no evidence of pneumothorax . Again seen is calcification of the pericardium .
    OUTPUT:
    
Persistent right - sided pleural effusion , unchanged from the prior study .