Indirect cavernous sinus arterio-venous fistula


These findings are typical of a so-called indirect (A-V) fistula between the cavernous internal carotid artery and veins within and lateral to the cavernous sinus producing raised retro-orbital pressures due to arterialization of the orbital veins (causing the globe to be proptosed).  Confirmation of the diagnosis requires catheter angiography with a view to embolization.