Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is re - demonstrated . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . A small left pleural effusion appears slightly increased in size compared to the prior exam with associated left basilar atelectasis . The right lung is clear . No pneumothorax is present . There are no new focal consolidations . No acute osseous abnormality is visualized .
    OUTPUT:
    
Small left pleural effusion , perhaps slightly increased from the prior study , with associated left basilar atelectasis .