FIG 1. A, Selective right internal carotid arteriogram (frontal view) shows an indirect right CCF with flow through the circular sinus (arrow) cross-filling the left cavernous sinus (arrowheads). There are coils within the right cavernous sinus from an embolization previously attempted at another institution. B, Later phase of the same injection. A large left SOV is opacified (arrow). C and D, On later phase images (C, frontal view; D, lateral view), the left SOV drains toward the left angular and facial veins (arrows). The left facial vein terminates in small collateral channels (arrowheads) and does not directly communicate to the jugular venous system.