Pivotal Study of the LVIS (Low Profile Visualized Intraluminal Support)

Inclusion Criteria: * Subject age between 18 and 75 years * Subject with an unruptured or ruptured(\>30days since occurence), wide-necked (neck ≥4mm or dome to neck ratio \<2)intracranial saccular aneurysm (\<20mm maximum diameter in any plane) Exclusion Criteria: * Subject with significant extra or intracranial stenosis of the parent artery (\>50%) proximal to the target aneurysm. * Subject with any condition which in the opinion of the treating physician would place the subject at high risk of embolic stroke * Subject with contraindications to the use of antiplatelet agents * Subject who is unable to complete the required follow-up