Fig. 3

Laminectomy alone. A 55-year-old female patient, ossification of ligamentum flavum and compression degeneration of spinal cord could be seen on CT (figure A, B) and MRI (figure C, D) before operation. We performed OLF resection with LA (Fig. E, F). During the 2-year follow-up, the preoperative JOA score increased from 7 to 8.5 (JOA score improvement rate was 37.5 %)