Carotid-anterior cerebral artery anastomosis

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Abstract
The angiographic and anatomical features of an anomalous communication between the intradural internal carotid artery and the anterior cerebral artery in a patient are described. Essential features of the anastomosis include an origin at, or close to, the origin of the ophthalmic artery, a course ventral to the ipsilateral optic nerve and anterior to the optic chiasm, and a termination near the anterior communicating artery. Although rare, the condition should be considered as an entity. The incidence of associated berry aneurysm and other congenital vascular anomalies is high.