Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size appears mildly enlarged . The aorta is unfolded . The mediastinal and hilar contours are relatively unremarkable . Pulmonary vasculature is not engorged . Increased interstitial opacities are seen within the lung bases as well as within the lung periphery diffusely , findings suggestive of a chronic interstitial lung disease . Patchy opacities in the lung bases may also reflect superimposed atelectasis , however there is no focal consolidation . No pleural effusion or pneumothorax is present . Marked degenerative changes of the left glenohumeral joint are seen .
    OUTPUT:
    
Probable chronic interstitial lung disease with possible superimposed bibasilar atelectasis . Comparison with previous radiographs would be helpful for further assessment , or consider nonemergent CT of the chest for further assessment if this has not been done previously .