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A patient (serial number 20, full-endoscopic laminotomy [FEL] group) underwent FEL for the left leg radiating pain in 2016, which improved; however, he had to undergo fusion surgery after diagnosis of right foraminal disc extrusion with newly developed right leg radiating pain after 17 months. (A: preoperative magnetic resonance imaging, B: 17 months later, C: postoperative radiographs).
