Introduction Enterprise stent is used for stent-assisted coiling of wide-neck intracranial aneurysms. It is a self-expanding flexible stent and has a close cell design. There are reports of migration of the stent after initial successful deployment.¹ The purpose of this study is to describe the incidence and extent of migration of the Enterprise stent and its influence on coiling.

Materials and Methods This retrospective study included 73 patients, (17 male and 56 females), with wide-necked intracranial aneurysms, who underwent stent assisted coiling using Enterprise stent over a period of 4 years. The results of the initial and follow-up cerebral angiograms were evaluated.

Results Thirty four patients (47%) had no displacement of the stent. Thirty five patients (48%) had <1.5 mm displacement of the stent, which was considered not significant. Only four patients (5%) had more than 2 mm migration of the stent after deployment. One of these patients in whom the stent was deployed across a basilar apex aneurysm, had a proximal displacement of the stent of 8.4 mm, with the distal end projecting into the base of the aneurysm. Successful coiling was achieved using waffle-cone technique in this patient. Two patients needed a second stent to allow adequate coverage of the neck of the aneurysm. There were no clinical complications.

Conclusion A majority of patients with wide-neck intracranial aneurysms treated with Enterprise self-expanding intracranial stent have no significant migration. A minority of patients develop migration requiring additional stents or modification in technique for coiling.

Competing interests None.

Reference 1. Kelly ME, Turner RD, Moskowitz SI, et al. Delayed migration of a self-expanding intracranial microstent. AJNR Am J Neuroradiol 2008;29:1959–60.