Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate pleural effusion at the base of left lung with compressive atelectasis at the left base which has increased significantly since the prior study . The cardiomediastinal silhouette and hilar contours are similar in appearance . There is no pneumothorax identified .
    OUTPUT:
    
Moderate pleural effusion and compressive atelectasis at the left base which has increased since the prior study . Findings communicated to Dr . ___ by telephone at 11 :47 on ___ by Dr . ___ .