Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Subtle opacity in the left lower lung is concerning for an early pneumonia . Right lung is clear . No large effusion or pneumothorax . The cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Subtle opacity in the left lower lung is concerning for an early pneumonia .