title: Y-configured dual intracranial stent-assisted coil embolization for the treatment of wide-necked basilar tip aneurysms.
abstract: OBJECTIVE
  Despite advances in both the surgical and endovascular treatment of intracranial aneurysms, wide-necked basilar tip aneurysms (i.e., basilar tip aneurysms in which both posterior cerebral arteries emanate from the base of a wide-necked aneurysm) represent a subset of aneurysms that continues to pose technical challenges in treatment. We sought to demonstrate the safety and short-term durability of a novel dual stent-assisted coil embolization technique.
  
  
  METHODS
  Two Neuroform stents (Boston Scientific/Target, Fremont, CA) were deployed in the posterior cerebral arteries and the basilar artery, one passing through the interstices of the other in a Y-configuration, thereby recreating an aneurysm neck and enabling safe coil delivery while preserving the parent vessels.
  
  
  RESULTS
  Seven patients with unruptured, asymptomatic, wide-necked basilar tip aneurysms involving both posterior cerebral arteries and ranging in size from 7 to 20 mm underwent treatment with this stent-assisted coiling technique. Two stents were successfully deployed in six of the patients and one stent was successfully deployed in the seventh. One patient developed a transient internuclear ophthalmoplegia, and another experienced transient partial right oculomotor nerve palsy. All aneurysms had complete or near-complete embolization with the initial procedure. Follow-up angiography performed 6 months (six patients) and 1 year (one patient) after treatment demonstrated coil compaction and slight recanalization in one patient and recanalization requiring retreatment in another. All patients were neurologically intact at least 6 months after the initial procedure, as well as subsequent procedures, without clinical signs of subarachnoid hemorrhage.
  
  
  CONCLUSIONS
  These initial technical and clinical results are highly encouraging, and this technique may significantly improve the endovascular treatment of intracranial aneurysms.
authors.affiliation: Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
authors.forename: William E
authors.initials: WE
authors.lastname: Thorell
authors.forename: Michael M
authors.initials: MM
authors.lastname: Chow
authors.forename: Henry H
authors.initials: HH
authors.lastname: Woo
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Masaryk
authors.forename: Peter A
authors.initials: PA
authors.lastname: Rasmussen
mesh_terms: D021721:Balloon Occlusion / Q000379:methods*; D002536:Cerebral Arteries / Q000601:surgery; D004867:Equipment Design; D006801:Humans; D002532:Intracranial Aneurysm / Q000601:surgery*; D015607:Stents; D016896:Treatment Outcome