Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . There is slight interstitial abnormality with peribronchial cuffing that is more prominent in the right lung than the left but vague . Small osteophytes are noted along the thoracic spine .
    OUTPUT:
    
Questionable interstitial abnormality primarily on the left ; differential considerations include lower airway inflammation or perhaps slight vascular congestion , but there is no frank congestive heart failure or focal consolidation .