Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right lung is clear . There is a persisting moderate to large left pleural effusion with adjacent atelectasis . No pneumothorax identified . The size and appearance of the cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
No significant interval change since the prior study with a persisting moderate to large left pleural effusion with subjacent atelectasis .