Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate well - expanded and clear lungs . The heart is normal in size . cardiomediastinal contour is notable for widening of the mediastinum , probably related to lipomatosis or lymphadenopathy . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Mediastinal widening , likely from lipomatosis or lymphadenopathy .