Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is thickening of the parahilar bronchial walls , possibly due to bronchitis . Otherwise , the lungs are well expanded and clear . The heart is top - normal in size . The mediastinal and hilar contours are unremarkable . No pleural abnormality is seen .
    OUTPUT:
    
Right parahilar bronchial wall thickening , which may represent acute bronchitis . No definite pneumonia .