Stenting in the Treatment of Aneurysm Trial

Inclusion Criteria: * All patients presenting at least one aneurysm candidate for coiling, with large (≥10mm), wide-necked (\>4mm), or recurrent lesions after coiling (but not stenting) and judged by the neurovascular team to require elective treatment provided that this single lesion, and no other aneurysm, will be treated during the endovascular session to be the object of the trial * The anatomy of the lesion is such that endovascular treatment is judged possible with or without stenting * The endovascular physician is a priori content to use either type of technique * The patient has not previously been randomized into the trial * Treatment is elective * Patient is 18 or older * Life expectancy is more than 2 years * Patient has given fully informed consent and has signed consent form Exclusion Criteria: * Other aneurysms requiring treatment during the same session * Patients with associated cerebral arteriovenous malformations * Patients with recently ruptured aneurysms * When parent vessel occlusion is the primary intent of the procedure * Any absolute contraindication to endovascular treatment, angiography, or anesthesia such as severe allergies to contrast or medications, including ASA and Clopidogrel * Patients with recurring, previously stented aneurysms