title: Y-stent-assisted coil embolization for the management of unruptured cerebral aneurysms: report of six cases.
abstract: BACKGROUND
  The advent of stent-assisted coil embolization has revolutionized the endovascular management of complex intracranial aneurysms. Although performed routinely in most cerebrovascular centers, there are not many case series reported about the Y-stent technique for coil placement in cerebral aneurysms. The authors present the second largest series available within the neurosurgical literature.
  
  
  METHODS
  The authors have retrospectively reviewed the medical records and angiographic data of six patients who were diagnosed as having unruptured cerebral aneurysms and subsequently treated using "Y" stent-assisted coil embolization. Five out of six cerebral aneurysms in this study were located at the basilar tip while the remaining one was at the left MCA trifurcation. Aneurysms ranged in size from 8-22 mm. All patients were female with ages ranging from 37-70 years. One patient presented with recurrence of an aneurysm previously managed with a balloon-assisted coil embolization. Another patient presented after a failed trial of a balloon-assisted procedure. One patient had originally been diagnosed with multiple aneurysms of varying size and location.
  
  
  RESULTS
  A "Y" configuration was successfully established in all six patients. Five patients have had a symptom-free recovery period at average follow-up period of 36.7 months. The remaining patient is notable for recurrence that was discovered on angiogram 32 months postoperatively.
  
  
  CONCLUSIONS
  The proposed Y-stent technique is a safe and effective option that can be employed in the endovascular reconstruction of unruptured intracranial aneurysms of complex location and orientation. These methods serve as an acceptable alternative in the management of aneurysms traditionally managed with microsurgery. Hemodynamic assessment has shown Y-stenting to be an advantageous therapy option, yet further studies are required to assess these parameters in alternative therapies.
authors.affiliation: Department of Neurosurgery, Froedtert Hospital & The Medical College of Wisconsin, Milwaukee, 53226, USA. alozen@mcw.edu
authors.forename: Andrew
authors.initials: A
authors.lastname: Lozen
authors.forename: Sunil
authors.initials: S
authors.lastname: Manjila
authors.forename: Richard
authors.initials: R
authors.lastname: Rhiew
authors.forename: Richard
authors.initials: R
authors.lastname: Fessler
mesh_terms: D000328:Adult; D000368:Aged; D002533:Cerebral Angiography; D004621:Embolization, Therapeutic / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy*; D008875:Middle Aged; D019736:Prostheses and Implants / Q000592:standards*; D012189:Retrospective Studies; D015607:Stents / Q000592:standards*