FIG 1. Case 2. Images of a 9-year-old male patient with a giant left vertebral aneurysm.

A, Towne projection.

B, Lateral projection.

C, After placing a coil at the neck of the aneurysm, complete elimination was achieved.

D, No retrograde filling was observed during injection into the right vertebral artery.

E and F, Cross-sectional images show complete regression of brain stem compression.