S21.239 - Puncture wound without foreign body of unspecified 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 S21.239 - Puncture wound without foreign body of unspecified back wall of thorax without penetration into thoracic cavity