Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to ___ chest radiograph , there are 2 new regions of ground - glass opacification in the right lung base . Bilateral lungs are hyperinflated with borderline increased AP diameter . Stable chronic degenerative disc calcification is also seen . Otherwise the cardiomediastinal and hilar silhouette are normal . Heart size is normal .
    OUTPUT:
    
Small evolving pneumonia in the right lung base . COPD