Head Trauma and Distal Anterior Cerebral Artery Aneurysm: Potential Role of an Adhesion to the Falx

Abstract

Proximity of the distal anterior cerebral artery (dACA) and the edge of the falx has been hypothetically implicated in the pathogenesis of traumatic dACA aneurysms. A 57-year-old patient presented with posttraumatic intracranial hemorrhage and an A3-bifurcation aneurysm that increased in size over the following 2 weeks. Because of higher endovascular risk, surgical clipping was preferred. Surgery revealed a fibrous adhesion between the falx and the dACA at the aneurysm site. This adhesion could provide an anatomical reason for the formation of a traumatic dACA aneurysm at the edge of the falx or rupture of a preexisting aneurysm.

Keywords

closed head trauma - distal anterior cerebral artery - falx cerebri - pericallosal aneurysm - traumatic intracranial aneurysm

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