Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate interval development of a large left pneumothorax . Slight rightward shift of the mediastinum suggests tension . The right apical pneumothorax is no longer seen . Subcutaneous and mediastinal emphysema is unchanged , as are multiple lateral right rib fractures . Right base atelectasis is slightly increased . The heart size remains normal .
    OUTPUT:
    
1 . New large left pneumothorax with rightward shift of the mediastinum suggestive of tension . 2 . Slight increase in right base atelectasis . 3 . Resolution of a small right apical pneumothorax and unchanged subcutaneous and mediastinal emphysema . These findings were communicated via telephone by ___ , MD , to ___ , NP , at ___ on ___ , immediately upon discovery .