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A Case of Coil Embolization with Crossing Y-Configuration Stenting for a Recurrent IC-PC Aneurysm after Clipping

Although the 10-year incidence of recurrence of intracranial aneurysms at the same site after clipping is <1%, regardless of rupture,1,2) additional treatment for recurrent aneurysms is often difficult.3,4) The therapeutic strategy, including open surgical and endovascular repair, must be evaluated for each patient. Y-configuration stenting (Y-stent-assisted coiling [Y-SAC])5) using two stents is an adjunctive technique for coil embolization, and there have been many reports on the application of this technique to basilar tip aneurysms, anterior communicating artery (Acom) aneurysms, and middle cerebral artery (MCA) aneurysms.6,7) In contrast, reports on Y-SAC for internal carotid-posterior communicating artery (IC-PC) aneurysms are limited because the placement of one stent in the internal carotid artery (ICA) is often sufficient and Y-SAC is rarely needed.8) We herein report a case in which crossing Y-SAC was effective for treating a recurrent IC-PC aneurysm that repeatedly caused subarachnoid hemorrhage (SAH), even after clipping. This report was approved by the ethics committee of Yamagata University Faculty of Medicine.