**1. Introduction**

268 Aneurysm

1231.

(suppl) 77.

1997;25: 460-469.

Neuroradiology 2001;22: 11-18.

[50] Geremia G, Haklin M, Brennecke L. Embolization of experimentally created aneurysms with intravascular stent devices. American Journal of Neuroradiology 1994;15: 1223-

[51] Wakhloo AK, Schellhammer F, de Vries J, Haberstroh J, Schumacher M. Self-expanding and balloon-expandable stents in the treatment of carotid aneurysms: an experimental

[53] Lylyk P, Ceratto R, Hurvitz D, Basso A. Treatment of a vertebral dissecting aneurysm

[54] Kurata A, Ohmomo T, Miyasaka Y, Fujii K, Kan S, Kitahara T. Coil embolisation for the treatment of ruptured dissecting vertebral aneurysms. American Journal of

[55] Benndorf G, Lehmann T, Schneider G, Wellnhofer E. Double stenting: technique to accelerate occlusion of a dissecting carotid artery aneurysm. Neuroradiology 1999;41:

[56] Lieber BB, Stancampiano AP, Wakhloo AK. Alteration of hemodynamics in aneurysm models by stenting: influence of stent porosity. Annals of Biomedical Engineering

study in a canine model. American Journal of Neuroradiology 1994;15: 493-502. [52] Lanzino G, Wakhloo AK, Fessler RD, Hartney ML, Guterman LR, Hopkins LN. Efficacy and current limitations of intravascular stents for intracranial internal carotid, vertebral,

and basilar artery aneurysms. Journal of Neurosurgery 1999;91: 538-546.

with stents and coils: technical case report. Neurosurgery 1998;43: 385-388.

Endovascular treatment of intracranial aneurysm has been increasingly performed worldwide. The recent publication of a multiple center randomized trial showing improved safety and clinical outcome of patients treated with endovascular methods as compared with open clipping is encouraging to endovascular neurosurgeons and accelerates this trend. 1 Stentassisted coil embolization, which is earliest reported by Higashida in 1997 2 and now widely accepted, has expanded the treatment possibilities. It allows for adequate coil placement, prevents coil protrusion into the parent vessel, and also helps prevent aneurysm recanalization. In the last decade, the development of intracranial stents has increased the options for the treatment of wide-necked aneurysms. Successful experiences of the stentassisted coiling have been reported by many teams in endovascular neurosurgery centers throughout the world. However, most of the reported complications involved a limited number of patients and varied among reports.3,4 There has been no systematic report of a relatively larger number of patients treated at a single institution, to provide an overview of these complications. The purposes of this article are to systematically document and analyze the periprocedural and follow-up complications of stent-assisted coiling of cerebral aneurysms at our institution and to tentatively answer the following question: is the incidence of complications with stent-assisted coiling acceptable, compared with the benefits?
