FIG 1. Subarachnoid hemorrhage (Hunt and Hess grade V) in a 19-year-old male patient.

A, Cerebral angiogram of the left vertebral artery shows distal aneurysm of the left superior cerebellar artery.

B, Selective opacification of the left superior cerebellar artery shows small aneurysm with favorable neck:body ratio.

C, Control angiogram obtained immediately after treatment shows complete aneurysmal occlusion.

D, MR image obtained at 6 months shows residual flow in the central part of the aneurysm without neck opacification.

E, MR angiogram obtained at 6 months shows residual flow in the central part of the aneurysm without neck opacification.

F, Follow-up conventional angiogram obtained at 12 months shows unchanged residual flow.

G, Follow-up MR angiogram obtained at 36 months shows unchanged residual flow.