S21.442 - Puncture wound with foreign body of left back wall of thorax with penetration into thoracic cavity S21.4 - Open wound of back wall of thorax with penetration into thoracic cavity S21.44 - Puncture wound with foreign body of back wall of thorax with penetration into thoracic cavity S21.442 - Puncture wound with foreign body of left back wall of thorax with penetration into thoracic cavity