title: How I do it? Biportal endoscopic spinal surgery (BESS) for treatment of lumbar spinal stenosis.
abstract: BACKGROUND
  Prevalent endoscopic spine surgeries have shown limitations especially in spinal stenosis (Ahn in Neurosurgery 75(2):124-133, 2014). Biportal endoscopic surgery is introduced to manage central and foraminal stenosis with its wide range of access angle and clear view.
  
  
  METHODS
  The authors provide an introduction of this technique followed by a description of the surgical anatomy with discussion on its indications and advantages. In particular, tricks to avoid complications are also presented.
  
  
  CONCLUSIONS
  Effective circumferential and focal decompression were achieved in most cases without damage to the spinal structural integrity with preservation of muscular and ligamentous attachments. The biportal endoscopic spinal surgery (BESS) may be safely used as an alternative minimally invasive procedure for lumbar spinal stenosis (Figs. 1 and 2).
authors.affiliation: Barun Spine Hospital, Yeoeudaebang-ro 1, Yeondeungpo-gu, Seoul, Republic of Korea. drccm@naver.com.
authors.forename: Chang Myong
authors.initials: CM
authors.lastname: Choi
authors.affiliation: Barun Spine Hospital, Yeoeudaebang-ro 1, Yeondeungpo-gu, Seoul, Republic of Korea.
authors.forename: Je Tea
authors.initials: JT
authors.lastname: Chung
authors.affiliation: Barun Spine Hospital, Yeoeudaebang-ro 1, Yeondeungpo-gu, Seoul, Republic of Korea.
authors.forename: Sang Jin
authors.initials: SJ
authors.lastname: Lee
authors.affiliation: Barun Spine Hospital, Yeoeudaebang-ro 1, Yeondeungpo-gu, Seoul, Republic of Korea.
authors.forename: Dae Jung
authors.initials: DJ
authors.lastname: Choi
mesh_terms: D019299:Decompression, Surgical / Q000379:methods; D004724:Endoscopy / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D008159:Lumbar Vertebrae / Q000601:surgery; D019060:Minimally Invasive Surgical Procedures / Q000295:instrumentation / Q000379:methods*; D019635:Neurosurgical Procedures / Q000295:instrumentation / Q000379:methods*; D013130:Spinal Stenosis / Q000473:pathology / Q000601:surgery*; D013131:Spine / Q000473:pathology / Q000601:surgery
keywords: Biportal; Degenerative spine; Endoscopic spinal surgery; Spinal stenosis