Fusiform M2 Aneurysm Treated By Flow Diversion: Case Report

Abstract

Fusiform cerebral aneurysms are uncommon vascular lesions, comprising approximately 3–13% of all intracranial aneurysms. The vertebrobasilar system represents the most frequent site of occurrence, while in the anterior circulation, the middle cerebral artery (MCA) is predominantly affected, followed by the internal carotid and anterior cerebral arteries. The pathogenesis of MCA fusiform aneurysms is primarily attributed to arterial dissection, atherosclerosis, or connective tissue disorders. Clinically, these aneurysms present with a spectrum of manifestations, including intracranial hemorrhage, cerebral ischemia, seizures, or mass effect, contingent upon their location, size, and extent of vascular involvement. The management of MCA fusiform aneurysms remains challenging due to anatomical complexities and technical difficulties associated with both open surgical and endovascular interventions. This report describes a case of a giant fusiform aneurysm located in the M2 segment of the MCA, successfully treated through an endovascular approach, highlighting the efficacy of this technique in complex neurovascular pathology.