Vein of Galen malformation (VOGM) | Boston Children’s Hospital

Learn more: Vein of Galen malformation (VOGM) is a type of arteriovenous fistula (AVF), a rare blood vessel abnormality in which arteries connect directly with veins, bypassing the capillaries. VOGM involves a large vein deep in the brain and is formed during early prenatal development. VOGM is often noticed on a prenatal ultrasound late in pregnancy, and in other cases is diagnosed after birth. Symptoms may include: - heart failure, often within the first day or two of life - increased head circumference, resulting from hydrocephalus - unusually prominent veins on the face and scalp - failure to meet developmental milestones - persistent headache - in very rare cases, a bleed in the brain VOGM can result in severe neurologic problems and may even be life-threatening if not diagnosed and treated early. When treated, however, the majority of children go on to live active and full lives. How we care for Vein of Galen Malform