Alaattin Yurt¹, Kubilay Uçar¹, Füsun Özer¹, İsmail Oran² and Nuri Arda³

¹Department of Neurosurgery, İzmir Training and Research Hospital, İzmir, Turkey. ²Department of Radiology, Ege University School of Medicine, İzmir, Turkey. ³Department of Neurosurgery, Dokuz Eylül Üniversity School of Medicine, İzmir, Turkey.

Abstract

Aneurysms of the complex of the anterior cerebral artery are frequently associated with anatomic variations of the circle of Willis. We describe a case of aneurysmal rupture of the anterior communicating artery, a variant of the anterior cerebral artery. The aneurysm appeared to be situated on this vessel proximal to the infered site of the AcoA. Surgery was performed at the 6th day after hemorrhage. The anterior communicating artery aneurysm was clipped. The post operative course was unventful, with complete recovery. In our case, an extremely rare variation of the proximal tract of the anterior cerebral artery, i.e. an infraoptic course of the proximal precommunicating tract under the optic nerve, with the distal A1 tract anterior to the chiasm and positioned between the optic nerves, is presented.

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