Coil migrating out of a small wide-necked aneurysm embolized with stent-assisted technique

Stent-assisted coiling is one of the techniques used to treat intracranial aneurysms with wide necks or unfavorable neck-to-fundus ratios, which have been traditionally considered as poor candidates for Guglielmi detachable coil (GDC) embolization owing to the significant risk of coil herniation into the parent artery. With this technique, fusiform, wide-necked and geometrically difficult aneurysms as well as pseudoaneurysms have been successfully treated with different follow-up results. Herein, the authors present an aneurysm case with a coil escaping from the confinement of the stent. (authors)