Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . The mediastinal and hilar contours appear unchanged . The lungs appear clear . There are no pleural effusions or pneumothorax . Minimal degenerative change along the mid thoracic spine that is unchanged . There is new sclerosis projecting along the course of the right posterior tenth rib , suggesting a prior fracture , but chronic .
    OUTPUT:
    
No evidence of acute disease . Suspected chronic right tenth rib fracture .