Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . There is an area of increased opacity seen at the left lung base , concerning for pneumonia . The right lung is clear . There is no large pleural effusions or pneumothorax .
    OUTPUT:
    
Left lower lobe pneumonia . Short interval followup is recommended upon completion of treatment to document resolution .