Fig 2.

Treatment of large vertebral artery dissecting aneurysm with brain stem compression in a 20-year-old man. A, 3D rotational angiography shows a large dissecting aneurysm on the fourth segment of the right vertebral artery. B, Stent-assisted coil embolization was performed. C, T2 axial MR image on postoperative day 12 shows coil meshes with extended thrombus in the aneurysm sac. D, Angiography after 3 months shows a jet flow into aneurysm sac. E, T2 axial MR image shows enlargement of aneurysm diameter with aggravation of brain stem compression. F, FD was performed using the FRED. G, Angiography 5 months after FD shows complete regression of jet inflow. H, T2 axial MR imaging shows a markedly decreased aneurysm sac diameter with diminished brain stem compression.