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Wide-necked basilar tip aneurysm. B) Marked blood flow stagnation can be observed within the aneurysm sac 6 minutes after WEB II deployment. C) CTA performed 9 months after treatment shows the WEB II correctly positioned within the aneurysm sac (note the 3 radio-opaque markers aligned with the aneurysm neck and the silhouette of the WEB II itself). Both posterior cerebral arteries appear patent.
