Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is diffuse central peribronchial wall thickening , compatible with reactive airways disease . Mild hilar / mediastinal lymphadenopathy seen on CT is not appreciated by radiography . There is no focal consolidation or pulmonary edema . Heart size is normal . No pleural effusions , pneumothorax , or pneumomediastinum .
    OUTPUT:
    
Small airways disease . No pneumonia or pulmonary edema .