Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left chest tube and pleural pigtail catheter are again present . Several of the pigtail catheter sideholes appear to be external to the pleural space and correlation is recommended . There is persisting and extensive subcutaneous emphysema along the left chest wall and neck . No discrete pneumothorax is identified . Since the prior exam the lucencies overlying the mediastinum or less conspicuous and attention on follow - up imaging is recommended . Unchanged platelike atelectasis in the right midlung zone and left lung base . The size the cardiac silhouette is within normal limits .
    OUTPUT:
    
1 . No discrete pneumothorax identified . 2 . The lucencies previously described overlying the mediastinum are less conspicuous and close attention on follow - up imaging is recommended to assess for pneumomediastinum . 3 . Several of the left pleural pigtail catheter sideholes appear to be external to the pleural space . Clinical correlation as to the pigtail catheters placement is recommended . Extensive subcutaneous emphysema persists .