S21.222 - Laceration with foreign body of left back wall of thorax without penetration into thoracic cavity S21.2 - Open wound of back wall of thorax without penetration into thoracic cavity S21.22 - Laceration with foreign body of back wall of thorax without penetration into thoracic cavity S21.222 - Laceration with foreign body of left back wall of thorax without penetration into thoracic cavity