title: Y-configuration Stent-assisted Coil Embolization for Wide-necked Intracranial Bifurcation Aneurysms.
abstract: OBJECTIVE
  The objective of this study was to determine the efficiency and safety of Y configuration stent-assisted coiling with double-closed stents for wide-necked intracranial aneurysms located at arterial bifurcations thorough analysis of a multicenter case series.
  
  
  METHODS
  A retrospective chart review was done on 10 patients who underwent endovascular treatment of wide-necked intracranial aneurysms with Y-configuration stent-assisted coil embolization in three centers from August 2011 to March 2014. The degree of aneurysmal occlusion was assessed using the Raymond scale. Clinical outcomes were assessed before operation, at discharge, and at the last follow-up visit using the Glasgow outcome scale.
  
  
  RESULTS
  The 10 patients included 6 females and 4 males with a mean age of 58.6 years. Indications for treatment included 6 unruptured intracranial aneurysms and 4 ruptured intracranial aneurysms. Five aneurysms were located at the basilar artery bifurcation, four aneurysms were located in an anterior communicating artery, and one aneurysm was in the pericallosal artery. The mean size of the 10 aneurysms was 9.7 mm. All aneurysms had a dome-to-neck ratio of < 1.5 (mean, 0.89). Immediate complications included one thromboembolic event out of the 10 cases. Immediate posttreatment angiograms showed complete occlusion in 1 aneurysm and residual necks in 9 aneurysms. Follow-up results showed 8 complete occlusions and 2 residual necks. No delayed complications were observed during the follow-up period (mean: 20 months).
  
  
  CONCLUSIONS
  Y configuration using double-closed cell stents is feasible and safe in selected patients. This method is an acceptable option for managing complex wide-necked bifurcations.
authors.affiliation: Department of Neurosurgery, Gyeongsang National University School of Medicine and Gyeongsang National, University Hospital, Jinju, Korea.
authors.forename: Kwangho
authors.initials: K
authors.lastname: Lee
authors.affiliation: Department of Neurosurgery, Gyeongsang National University School of Medicine and Gyeongsang National, University Hospital, Jinju, Korea.
authors.forename: Hyun
authors.identifier: 0000-0002-2422-4389
authors.initials: H
authors.lastname: Park
authors.affiliation: Department of Neurosurgery, Gyeongsang National University School of Medicine and Gyeongsang National, University Hospital, Jinju, Korea.; Department of Neurosurgery, College of Medicine, Gyeongsang National University and Institute of Health, Sciences, Jinju, Korea.
authors.forename: Insung
authors.initials: I
authors.lastname: Park
authors.affiliation: Department of Neurosurgery, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
authors.forename: Sukh Que
authors.initials: SQ
authors.lastname: Park
authors.affiliation: Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: O-Ki
authors.initials: OK
authors.lastname: Kwon
authors.affiliation: Department of Neurosurgery, Gyeongsang National University School of Medicine and Gyeongsang National, University Hospital, Jinju, Korea.
authors.forename: Jongwoo
authors.initials: J
authors.lastname: Han
keywords: Cerebral aneurysm; Closed cell stent; Wide-necked aneurysm; Y-stent-assisted coil embolization