Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large left pneumothorax with rightward shift of mediastinal structures is concerning for tension . There is atelectasis of the left lung . Coarse interstitial and reticular opacities are again demonstrated throughout both lungs with architectural distortion and a more focal opacification is seen within the right apex . No right - sided pneumothorax is demonstrated , nor is there a large pleural effusion . No acute osseous abnormalities are seen .
    OUTPUT:
    
Large left tension pneumothorax . At the time of discovery at 10 :07 , ___ , the patient has had a subsequent chest radiograph performed which demonstrated insertion of the chest tube in the left lung .