Fig. 2From: Percutaneous transforaminal endoscopic decompression with removal of the posterosuperior region underneath the slipping vertebral body for lumbar spinal stenosis with degenerative lumbar spondylolisthesis: a retrospective studyIntraoperative endoscopic views. (A and B) The PRSVB was removed with an endoscopic bone knife. (C and D) Dorsal and ventral L5 nerve roots were fully decompressed. The black arrow represents the PRSVB. The white arrow represents the superior articular process of L5Back to article page