S21.232 - Puncture wound without 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 S21.23 - Puncture wound without foreign body of back wall of thorax without penetration into thoracic cavity S21.232 - Puncture wound without foreign body of left back wall of thorax without penetration into thoracic cavity