Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is borderline in size . Patchy calcification is noted along the aortic arch . There is no pleural effusion or pneumothorax . There is a mild interstitial abnormality mostly characterized by mild peribronchial cuffing . There is no upper zone redistribution of pulmonary vasculature and the pulmonary vessels appear distinct . Neither hilum appears congested . The left cardiac apex is slightly obscured on the frontal view but probably due to a fat pad rather than a pulmonary opacity .
    OUTPUT:
    
Mild interstitial abnormality suggestive of airway inflammation or atypical pneumonia .