Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . Calcified densities in the anterior mediastinum most likely represent calcified lymph nodes , and are unchanged .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Stable , calcified densities in the anterior mediastinum most likely represent calcified lymph nodes related to prior granulomatous exposure .