A 65-year-old woman presented with gait disturbance 12 months ago. A : Pre-operative cervical MRI demonstrates severe spinal cord compression at C4, 5, 6, 7 levels with high signal change on T2-weighted imaging. B : Pre-operative C-CT shows continuous and hill-shaped OPLL in C5, 6 levels with 60% (7.7/12.8mm) of SAC. C : Laminoplasty C4, 5, 6, 7, corpectomy C5, 6, anterior cervical interbody fusion C4-7 and anterior cervical plate fixation C4-7 are done. D : Postoperative cervical CT shows increased SAC from 60% to 100%.