Endovascular treatment has assumed a major role in the management of intracranial aneurysms. Although current techniques have proven extremely effective in the embolization of a large number of intracranial aneurysms, wide-necked basilar tip aneurysms represent a subset that continues to pose technical challenges in treatment. This study reports our experience with WEB II, a new embolization device employed in four patients with this type of aneurysm.
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