Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Redemonstrated is known chronic interstitial lung disease which is seen bilaterally . As compared to the prior examination dated ___ , there is relatively increased asymmetrical airspace opacity within the left lower lobe , which may represent a superimposed pneumonia . The right lung and left upper lung are clear of consolidation . There is no large pleural effusion or pneumothorax . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Chronic findings of known interstitial lung disease with superimposed consolidation in the left lower lobe , raising the possibility of pneumonia .