Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small subtle opacity in the left mid lung which is appreciated only on the frontal view is suspicious for early pneumonia . Right lung is clear . Heart size , mediastinal and hilar contours are normal . There is no pleural abnormality .
    OUTPUT:
    
Ill - defined , small opacity in left mid lung is concerning for an evolving pneumonia . Dr . ___ ___ these findings with Dr . ___ on ___ at 3 :50 p .m .