Unilateral biportal endoscopic discectomy for very highly migrated upper lumbar disc herniation: A case report

Key Points

• This report aims to highlight the unique challenges and outcomes of endoscopic discectomy for high-level lumbar disc herniation.
• Utilized unilateral biportal endoscopic techniques.
• Examined endoscopic findings at L2-3 and L1-2 levels.
• Identified the presence of nucleus pulposus in dorsal epidural space.
• No nucleus pulposus found at the L2-3 level.
• Free nucleus pulposus discovered at the dorsal epidural space of the L1-2 level.