Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal hilar contours are normal . There is no pleural effusion or pneumothorax . The lungs splenic . A new focal opacity in the left upper lung . This concerning for an infectious process . The upper abdomen is unremarkable .
    OUTPUT:
    
Left upper lobe pneumonia . This should be followed to imaging resolution .