S21.449 - Puncture wound with foreign body of unspecified 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 S21.449 - Puncture wound with foreign body of unspecified back wall of thorax with penetration into thoracic cavity