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 . There is a vague left lower lobe opacity although visible in both views . Elsewhere the lungs appear clear .
    OUTPUT:
    
Opacity in the left lower lobe suggestive of pneumonia in the appropriate setting .