Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior chest radiograph of ___ , there has been interval improvement in subcutaneous and mediastinal air . Multiple displaced right lateral rib fractures demonstrate minimal periosteal reaction . A large right apical and lateral pneumothorax has increased since ___ . There is a right pleural effusion and right lower lobe atelectasis . The left upper lung is clear , and there is mild atelectasis in the left lower lung . There is no left - sided pneumothorax .
    OUTPUT:
    
Marked interval increase in the size of a large right apical and lateral pneumothorax . Relatively unchanged right pleural effusion and right lower lobe atelectasis .