Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mediastinal and hilar lymphadenopathy appears improved compared with ___ , especially in the region of the azygos arch , though the trachea remains leftward deviated . The lungs are clear . The pleural surfaces are normal . The cardiac silhouette is normal in size .
    OUTPUT:
    
Clear lungs ; interval improvement in mediastinal and hilar lymphadenopathy , which remains moderate in degree .