Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable AP chest radiograph was obtained . The lungs are hyperinflated . Interstitial markings are enhanced at both lung bases . There is no focal consolidation , effusion , or pneumothorax . There is linear scarring at the apices . There are no abnormal cardiac and mediastinal contours . A 3 cm dense lesion in the proximal left humeral metaphysis shows a peripheral pattern of ring and arc mineralization .
    OUTPUT:
    
1 . Severe emphysema . No pneumonia or evidence of heart failure . 2 . Left humeral head enchondroma .