Fig. 1

MRA findings. (A) Neck MRA revealed the stenosis of the V2 segment of the left vertebral artery (white arrow); (B) Axial MRA revealed “double lumen” of the left vertebral artery (white arrow); (C, D) Neck and axial MRA performed two months later revealed the improvement of the left vertebral artery dissection. MRA, magnetic resonance angiography