Fig. 2

Hand-drawn schematic diagram of surgical procedure a The paraspinal muscles were dissected and separated under the periosteum to expose the spinous process and lamina, while the supraspinous and interspinous ligaments remained intact. b, c Minimal laminotomy was performed on the open side, and a green stick fracture was formed on the opposite side. d A stretcher was used to expose the visual field of the operation. e, f A longitudinal incision was made at the center of the posterior dura mater under a microscope and pulled open with silk thread. Complete separation and resection of the tumor were performed to decompress the spinal cord. g Waterproof suture was performed on the dura mater after tumor resection. h The lamina was reduced and fixed with titanium screw and ARCH plate. Moreover, the suture line of tendon was used to fix the supraspinous ligament of the head and tail of the lamina