Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ , there is increased hazy opacification of the left lung . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette is unchanged . An endotracheal tube and enteric tube are stable in position .
    OUTPUT:
    
Interval increase in hazy opacification of the left lung may represent pneumonia .