First low : Brain sonography. Dilated vein of Galen is observed (left). Cerebral angiography. Vein of Galen is supplied by posterior cerebral
artery and pericallosal artery (right). Second low : Transarterial embolization with coil and Onyx. First transarterial embolization with coil via posterior cerebral artery at 2 weeks of age and second embolization with Onyx via pericallosal artery at 1 year of age were performed, respectively (left). Follow-up angiography. There is no evidence of remaining shunt (right).