A Case of Old Unreduced Atlanto-axial Dislocation

Operative treatment was applied for an old unreduced dislocation of atlas with nonunion of odontoid process and incomplete C-1 quadriplegia. Reduction wasn't performed with conservative treatment such as skull traction and halo-pelvic traction. Furthermore, reduction wasn't succeeded through transoral approach, but decompression was performed with resection of anterior arch of atlas and odontoid process. After all, posterior cervical fusion from occiput to third cervical vertebra was performed, so pain and paresthesia were improved.