Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This causes crowding of the bronchovascular structures . Mediastinal contour is unchanged and a left - sided intrathoracic stomach is again demonstrated . Heart size is difficult to assess given the presence of the intrathoracic stomach . 2 .8 - cm left hilar mass containing calcifications is re - demonstrated , similar in size compared to the previous study . Patchy opacities in the lung bases may reflect atelectasis though infection is not excluded . Additionally , a trace right pleural effusion may be present . There is no overt pulmonary edema . No pneumothorax is seen . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
1 . Low lung volumes with bibasilar opacities likely atelectasis , though infection is not excluded . A trace right pleural effusion may also be present . 2 . No interval change in appearance of the left hilar mass .