S21.4 - Open wound of back wall of thorax with penetration into thoracic cavity
S21.41 - Laceration without foreign body of back wall of thorax with penetration into thoracic cavity
S21.411 - Laceration without foreign body of right back wall of thorax with penetration into thoracic cavity
S21.412 - Laceration without foreign body of left back wall of thorax with penetration into thoracic cavity
S21.419 - Laceration without foreign body of unspecified back wall of thorax with penetration into thoracic cavity