Clinical Study

Foraminoplasty at the Tip or Base of the Superior Articular Process for Lateral Recess Stenosis in Percutaneous Endoscopic Lumbar Discectomy: A Multicenter, Retrospective, Controlled Study with 2-Year Follow-Up

Figure 1

The puncture needle was first placed on the dorsal surface of facet joint, which was confirmed by the anteroposterior (left) and lateral (right) views of fluoroscopy.