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. 2019 Aug 28;32(8):324–329. doi: 10.1097/BSD.0000000000000876

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Copyright © 2019 The Author(s). Published by Wolters Kluwer Health, Inc

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc-nd/4.0/

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The target spinal level on an axial view of an MRI scan. The patient was a 45-year-old man with grade 3 LCCS who presented with upper gluteal pain radiating to both lower extremities and severe neurogenic claudication with walking ability limited to <100 m. Axial views of L4/L5 in the preoperative state (A) and 1 week after operation (B) are shown. After UBESS, the follow-up MRI scan showed grade 1 LCCS. His clinical symptoms improved and walking capacity increased to 1500 m. LCCS indicates lumbar central canal stenosis; MRI, magnetic resonance imaging; UBESS, unilateral biportal endoscopic spine surgery.