Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . The lungs are hyperinflated . There is subtle left perihilar opacity without definite correlate on the lateral view , potentially concerning for a very early pneumonia . No large effusion or pneumothorax . Cardiomediastinal silhouette appears normal . Bony structures are intact .
    OUTPUT:
    
Possible early left perihilar pneumonia .