The MicroVention Low-profile Visualized Intraluminal Support (LVIS*) Device is intended for use with bare platinum embolic coils for the treatment of unruptured, wide neck (neck greater than or equal to 4 or a dome to neck ratio less than two), intracranial, saccular aneurysms arising from a parent vessel with a diameter of greater than or equal to 2.5mm and less than or equal to 4.5mm.