Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal contours appear within normal limits . There are patchy bilateral perihilar opacities , more extensive on the left than right , including bronchovascular opacity in the left lower lobe , which is best depicted on the lateral view . Central airways appear cuffed . Elsewhere , the lungs appear clear . There are no pleural effusions or pneumothorax . Bony structures appear within normal limits .
    OUTPUT:
    
Findings consistent with pneumonia . Given the predominance of streaky perihilar opacification , in addition to typical bronchopneumonia , atypical infection could also be considered as a potential etiology .