Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . There is no focal consolidation , pleural effusion , or pneumothorax . Left retrocardiac opacity likely represents atelectasis . The heart size is mildly enlarged . Degenerative changes are noted in the thoracic spine . Erosive changes at the left glenoid and humeral head whic appear dislocated may be old but clinical correlation suggested . Similar but perhaps less extensive changes seen at the right glenohumeral joint as well .
    OUTPUT:
    
Slightly limited by low lung volumes . Retrocardiac opacity may represent atelectasis ; however , infection can not be entirely excluded . Changes at the glenohumeral joints - including erosive changes on both sides of the joints and probable dislocations , left worse than right . These changes may be old but please correlate clinically regarding need for further workup . The changes to the preliminary report regarding the glenohumoral findings were discussed with Dr . ___ by Dr . ___ ___ telephone at 4 : 20 pm .