FIG 4. A 88-year-old man with Hunt-Hess grade 2 subarachnoid hemorrhage.

A, Lateral view right internal carotid DSA demonstrates a 3 x 6-mm anterior choroidal artery aneurysm. Oblique views (not shown) demonstrated direct origin of the anterior choroidal artery from the neck of the aneurysm. Significant atherosclerotic disease involving the cavernous right internal carotid artery and the right middle cerebral artery is also demonstrated.

B, Lateral view right internal carotid DSA immediately after detachment of four GDCs measuring a total length of 20 cm demonstrate occlusion of the fundus and dome of the aneurysm. A residual neck remnant (arrow) was intentionally left to preserve the origin of the anterior choroidal artery.