Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation . Mild perihilar peribronchial thickening is seen bilaterally . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Mild perihilar peribronchial thickening bilaterally , which can be seen with small airways disease or bronchitis . No focal consolidation to suggest pneumonia .