Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a persistent small right pleural effusion . No free air below the right hemidiaphragm . Overall , no change from prior . Cardiomediastinal silhouette is normal . No pneumothorax . Bony structures are intact .
    OUTPUT:
    
Small right pleural effusion unchanged .