Figure 2: Conventional digital subtraction angiography of the brain. (a) These scalp arteriovenous fistulas were primarily fed by the occipital artery (white arrow). (b) The distal branch of the thyrocervical trunk (white arrow) was also a feeder. (c) Endovascular embolization for these scalp fistulas was performed with microcoils, onyx, and poly (glycolide-co-lactide)