Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chronic bibasilar lung disease is similar to prior exams with atelectatic changes and interstitial thickening . No new consolidation is definitively identified . There is no pneumothorax or large effusion . The heart and mediastinal contours are normal .
    OUTPUT:
    
Stable appearance of chronic lung changes on top of known bronchioalveolar cell carcinoma .