Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . The left perihilar interstitium is mildly prominent suggesting airway inflammation , but otherwise , the lungs appear clear .
    OUTPUT:
    
Suspected airway inflammatory changed about the left hilum .