Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , interval improvement in the right hilar focal opacity is noted . However , there is still a suggestion of hilar adenopathy . Lungs are clear . Heart size is top normal . No pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Interval improvement in right perihilar opacity since ___ , but possible persistent hilar adenopathy .