Figure 1.

A) DSA showing a slightly irregularly shaped basilar tip wide-necked aneurysm. Both posterior cerebral arteries originate in proximity of the aneurysm neck, thus discouraging the use of coils and intraluminal flow diverters. B) DSA performed 2.5 hours after WEB II deployment. The aneurysm lumen is occluded and the WEB II device appears correctly positioned within the aneurysm. No sign of occlusion of both posterior cerebral arteries can be observed. C) Follow-up DSA performed 6 months after treatment shows a small bulging located at the tip of the basilar artery.