Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small left apical pneumothorax . There is no right pneumothorax . Heterogeneous opacities bilaterally , particularly along the left heart border may represent atelectasis or sequela of contusion or potentially edema . Minimally displaced left fifth , sixth , and seventh rib fractures are noted . Right posterior seventh rib fracture is also mildly displaced . Heart size and mediastinal contours are within normal limits . Planning of the left AC joint may be chronic .
    OUTPUT:
    
1 . Left fifth , sixth , and seventh rib fractures . Right posterior seventh rib fracture . 2 . Small left apical pneumothorax .