Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior exam , the interstitial markings have become coarser , consistent with progression of underlying chronic lung disease . There is stable hyperinflation and flattening of the hemidiaphragms . There is no consolidation or edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
1 . Progression of chronic lung disease . 2 . No evidence of pneumonia .