"True" Accessory Anterior Cerebral Artery: A Newly Reported Anterior Cerebral Arterial Anomaly and a Proposal for Its Classification.

If we use the same naming policy of middle cerebral arterial anomalies, then accessory anterior cerebral arteries (ACAs) should be applied for ACA anomalies originating from the ACA. We experienced such a rare ACA anomaly, which we referred to as true accessory ACA.