Intentional Herniation Technique with the Neuroform EZ Stent System for Preservation of Aneurysmal Neck Branch: A Case Report

Abstract

Endovascular treatment of bifurcation aneurysms is difficult and complicated because arterial branches may arise from theaneurysmal neck. We treat these cases with complex techniques such as Y or T stenting. In this report, we deployed one NeuroformEZ stent using the intentional herniation technique for the preservation of arterial branches. A 78-year-old female presented withtwo unruptured aneurysms. One was an 8 mm aneurysm located at the bifurcation of the internal carotid artery and the posteriorcommunicating artery (PcomA). The other was an 11 mm aneurysm located at the cavernous segment of the internal carotid artery.A 4.5×20 mm Neuroform EZ stent was placed across the aneurysm neck. The delivery wire and microcatheter were pushed duringdeployment, similar to braided stents. High resolution cone beam computed tomography (CT) after stenting revealed the stent strutto be vertically aligned near the aneurysmal sac, and the PcomA orifice was preserved. We performed coil embolization easily andachieved acceptable obliteration. Our intentional herniation technique may be useful in some cases. Open cell stents have someadvantages depending on the method of deployment.