S21.242 - Puncture wound 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 S21.24 - Puncture wound with foreign body of back wall of thorax without penetration into thoracic cavity S21.242 - Puncture wound with foreign body of left back wall of thorax without penetration into thoracic cavity