Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lower lung opacity which increased between ___ and ___ , and stable since then , reflects either atelectasis or in an appropriate clinical situation , pneumonia . Pleural effusion if any is minimal on the left side , unchanged ___ . Cardiomediastinal silhouette is stable in appearance .
    OUTPUT:
    
Left lower lung opacity increased between ___ and ___ is likely atelectasis or pneumonia . Findings were discussed with Dr . ___ by phone on ___ at 12 :33 p .m .