颈椎管内髓外硬膜下肿瘤的传统手术采用后正中全椎板入路切除肿瘤,先切除肿瘤相应节段脊柱的棘突和椎板,再显露并切除肿瘤。手术需要切除全部椎管后部骨质,手术创伤大,容易引起术后脊柱不稳定。我们于2006年6月至2010年5月采用半椎板切除入路显微手术治疗21例颈椎管 Cervical medullary extramedullary subdural tumors of the traditional surgery using posterior midline total lamina resection of the tumor, first remove the corresponding segment of the spine spinous process and lamina, and then reveal and remove the tumor. Surgical removal of all posterior spinal bone, surgical trauma, easily lead to postoperative spine instability. In June 2006 to May 2010, we adopted half-laminectomy microsurgical treatment of 21 cases of cervical canal