FIG 1. A, Angiogram of right ICA before embolization (anteroposterior view, early arterial phase) shows huge CCF and no opacification of intracranial vessels.

B, Lateral angiogram of the right ICA shows CCF drainage by the right superior ophthalmic vein, both CS, the inferior petrosal sinus, and pterygoid sinus.

C, Left ICA angiogram before embolization (anteroposterior view, early arterial phase) shows cross flow via the anterior communicating artery.