====== 2021 ======

[[2020]]-[[2022]]

[[World Health Organization Classification of Tumors of the Central Nervous System 2021]]

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In a study of [[2021]], [[risk factor]]s for early [[recurrent lumbar disc herniation]] after [[lumbar discectomy]] were age ≥ 50 years and moderate [[disc degeneration]]. The [[annular closure device]] reduced the risk of early reherniation
((Kienzler JC, Fandino J, Van de Kelft E, Eustacchio S, Bouma GJ; Barricaid® Annular Closure RCT Study Group. Risk factors for early reherniation after lumbar discectomy with or without annular closure: results of a multicenter randomized controlled study. Acta Neurochir (Wien). 2021 Jan;163(1):259-268. doi: 10.1007/s00701-020-04505-4. Epub 2020 Oct 21. PMID: 33085021.)).