Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval increase in a small left apical pneumothorax . The lungs are fully expanded and clear . All the cardiomediastinal and hilar contours are stable . The remaining pleural surfaces are normal . There are unchanged mildly angulated , minimally displaced fractures of the left anterolateral sixth , seventh , and likely eighth ribs . Note , radiograph is not sensitive for the detection of subtle or nondisplaced rib fractures .
    OUTPUT:
    
Small left apical pneumothorax .