Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and hilar contours are normal . Diffuse increased reticulonodular markings are unchanged from prior exam and is chronic . Lungs are otherwise clear without focal consolidation . There is no effusion or pneumothorax .
    OUTPUT:
    
Stable reticulonodular markings suggestive of a chronic interstitial process without evidence of pneumonia .