Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , there has been interval development of a moderate left - sided pleural effusion with adjacent atelectasis or left basilar consolidation . The cardiomediastinal silhouette is normal . No pneumothorax , or free subdiaphragmatic air .
    OUTPUT:
    
Interval development of a moderate left - sided effusion with adjacent left basilar consolidation / atelectasis .