Fig. 3

A 53-year-old male patient (e, f, g, and h) of the dissatisfied group at the last follow-up developed numbness in his two hands and weakness in his four extremities for 3 years. He was performed with open-door laminoplasty without related-complications. But he relieved some of the preoperative symptoms whose physical activities were significantly limited with the JOA scores improving from 7.5 pre-operation to 11.8 post-operation