Fig. 2From: Percutaneous endoscopic interlaminar discectomy via inner border of inferior pedicle approach for downmigrated disc herniation: a retrospective studyDiagrams of fenestration laminectomy. A Spine model; B, C location of the trephine under anterior–posterior fluoroscopy (arrow: trephine); D area (red part) cut off and removed together with the trephine; E after fenestration laminectomyBack to article page