Endovascular treatment for P2 segment aneurysms of the posterior cerebral artery

Abstract

Purpose: To evaluate treatment outcome of P2-segment aneurysms of the posterior cerebral artery by coil embolization. Subjects: Seven patients (three with subarachnoid hemorrhage due to ruptured aneurysms and four with unruptured ones) underwent endovascular treatment. 4 patients presented with unruptured aneurysms, 1 presented with mass effect, 1 was associated with another ruptured cerebral aneurysm, and 2 were diagnosed during a routine examination for headache. Results: Endosaccular coil embolization was performed for the saccular aneurysms (3 ruptured and 2 unruptured cases) and parent vessel occlusion was performed for the fusiform aneurysm (1 unruptured case) and thrombosed aneurysm (1 unruptured case). No apparent complications were noted perioperatively or during the follow-up periods of 2 years to a maximum of 5 years and 5 months, average: 3.6 years. Retreatment was not required for any case. Conclusion: Outcomes of endovascular treatments for P2-segment aneurysms of the posterior cerebral artery were good. If endosaccular coil embolization is not possible, it is advisable to evaluate collateral circulation with an occlusion test, checking the presence of neurological ischemic symptoms, and perform parent artery occlusion. However, each case requires individual consideration. © 2010, The Japanese Society for Neuroendovascular Therapy. All rights reserved.