Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . There is a nondisplaced fracture involving the right posterolateral eighth rib , of indeterminate chronicity . The lungs appear clear . There are no pleural effusions or pneumothorax . Mild degenerative changes are noted along the thoracic spine .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease . Nondisplaced right posterolateral eighth rib fracture of indeterminate chronicity .