Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the chest radiograph obtained 1 day prior , there has been interval removal of a left - sided chest tube , the small left apical pneumothorax is probably unchanged given differences in patient positioning , and there is a new area of hazy opacification projecting over the lateral mid left lung . There is a band of right lower lobe atelectasis . There are probably small , bilateral pleural effusions .
    OUTPUT:
    
Unchanged , small left apical pneumothorax . Left lung opacity may represent atelectasis or postoperative edema or hematoma .