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 . The pulmonary interstitium is mildly prominent , particularly involving the lower lungs , most suggestive of mild fluid overload . There is no discrete focal opacity , however . Fissures are mildly thickened . There is no pleural effusion or pneumothorax . Very small anterior osteophytes are noted along the thoracic spine .
    OUTPUT:
    
Mild interstitial prominence suggestive of slight fluid overload .