Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The hilar and mediastinal contours are normal . There is thickening of the interstitial markings . There is no focal consolidation . There is no pneumothorax or pleural effusions . Degenerative changes are noted along the mid thoracic spine .
    OUTPUT:
    
Coarsened interstitial markings which may suggest chronic lung disease .