FIG 6. Graph shows the mean percentage of volumic aneurysmal occlusion according to sac size at completion of the initial endovascular treatment in group A (neck 4 mm) and group B (neck >4 mm). Black bars indicate sac size <5 mm; dark gray bars, sac size 5–10 mm; medium gray bars, sac size 10–15 mm; light gray bars, sac size 15–20 mm.