Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Post - surgical changes are again identified on the left reflecting recent biopsy . There is no substantial change in multifocal opacities reflecting known interstitial lung disease accounting for slightly increased lung volumes on the present study . No new opacity to suggest pneumonia . No pneumothorax or effusion . Unchanged hilar and cardiomediastinal contours .
    OUTPUT:
    
Stable postoperative changes and multifocal interstitial abnormalities compatible with known interstitial lung disease .