Three cases of angiographically demonstrated fenestration of the anterior cerebral artery are reported. Fenestration occurred at the medial half of the horizontal segment of the anterior cerebral artery in all cases. Its embryology and clincial significance are briefly discussed, and the anatomical and radiological literature on fenestration of the anterior cerebral artery is reviewed.
Key words Fenestration - Anterior cerebral artery - Anomaly, vascular