Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval development of pneumomediastinum with air tracking into the fascia planes of the neck . No large pneumothorax is identified . Heart size remains moderately enlarged . The aortic knob is calcified . Coarse diffuse interstitial opacities are noted bilaterally compatible with known fibrosing chronic interstitial lung disease . Increased opacities at the lung bases likely rib reflect superimposed atelectasis . No new large pleural effusion or pulmonary edema is definitively present . Surgical anchor projects over the right humeral head . Moderate multilevel degenerative changes are seen within the thoracic spine . Multiple clips are noted in the left upper abdomen .
    OUTPUT:
    
1 . Interval development of pneumomediastinum and subcutaneous gas tracking into the fascia planes of the neck . 2 . Fibrosing chronic interstitial lung disease , not substantially changed in the interval , with bibasilar opacities , likely atelectasis . 3 . Moderate cardiomegaly , unchanged .