Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is biapical pleural thickening . The lungs are otherwise clear . Heart size is stable . The mediastinal and hilar contours are stable . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen . There is an old healed fracture of the ninth lateral rib , but no acute rib fractures .
    OUTPUT:
    
1 . Stable enlargement of the cardiac silhouette , but no evidence of congestive heart failure . 2 . No acute rib fractures .