Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is curvilinear density over the left upper lobe laterally , new compared with ___ , which raises the question of a small pneumothorax . However , the appearance is somewhat atypical and no correlative finding is identified on the ___ chest CT . The differential could include artifact due to a skin fold . No obvious right apical pneumothorax is identified . Possible mild interval increase in upper zone redistribution . Otherwise , allowing for differences in positioning , the cardiomediastinal and pleural slight parenchymal findings are overall similar . Incidental note is made of marked narrowing of the right rotator cuff interval , consists with chronic rotator cuff tear and severe glenohumeral osteoarthritis bilaterally .
    OUTPUT:
    
1 . Curvilinear density at the left upper lobe , equivocal for a small pneumothorax . The differential could include a skin fold . Clinical correlation and attention to this area on followup films is requested . 2 . No right - sided pneumothorax identified . 3 . Possible slight increase in the degree of upper zone redistribution . Otherwise , I doubt significant interval change .