Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is unchanged . The mediastinal and hilar contours are normal . The pulmonary vascularity is normal and the lungs are clear . A small right pleural effusion is noted . No pneumothorax is visualized . Deformity of the right clavicle , scapula , and multiple ribs with osseous fusion likely reflects prior traumatic injury .
    OUTPUT:
    
Small right pleural effusion .