Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable AP radiograph of the chest once again demonstrates extensive subcutaneous emphysema throughout the thorax . A left chest tube is unchanged in position and the previously seen pleural edge is no longer visualized , indicating resolution of the pneumothorax . Minimally displaced fractures of the posterior left second and fifth ribs are once again seen . There is no pleural effusion , and the hilar and cardiomediastinal contours are normal . Right middle lobe atelectasis persists , but the lungs are otherwise clear .
    OUTPUT:
    
1 . No evidence of pneumothorax or recurrent effusion following placement of chest tube on waterseal . 2 . Persistent extensive subcutaneous emphysema . 3 . Persistent right middle lobe atelectasis . 4 . Stable minimally displaced fractures of the posterior second and fifth ribs on the left .