Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation or pneumothorax . A small left pleural effusion is best seen on the lateral radiograph . The cardiomediastinal silhouette is normal . The imaged upper abdomen is unremarkable . The right first and second ribs appear congenitally abnormal .
    OUTPUT:
    
Small left pleural effusion .