Fig. 3

MR angiography showing hypoplasia and parietal irregularities of the V1 and V2 segments (white arrow) and agenesis of the V3 and V4 segments of the right vertebral artery (RVA). LVA: left vertebral artery
MR angiography showing hypoplasia and parietal irregularities of the V1 and V2 segments (white arrow) and agenesis of the V3 and V4 segments of the right vertebral artery (RVA). LVA: left vertebral artery