Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a persistent small left pneumothorax , smaller from ___ . Pleural thickening , fluid and atelectasis of the left lung base is unchanged . The right lung is largely clear . The cardiac and mediastinal contours are normal . Left rib fractures are again seen .
    OUTPUT:
    
Resolving , small left apical pneumothorax .