Fig. 3.

A 67-year-old woman complained of lower back pain and neurological intermittent claudication and was diagnosed with multiple lumbar stenosis with instability. She had undergone tri-segmental lumbar fusion operation. A : Simple lateral radiograph on postoperative one year shows no abnormality. B : Compared with postoperative one year, simple lateral radiograph on postoperative two years shows movement of L2 pedicle screws and radiolucency around the screws.