Orbital arteriovenous fistula with symptoms contralateral to the arterial supply. A case report.

Carotid-cavernous sinus fistulas presenting signs and symptoms contralateral to the arterial supply of the fistulas are not uncommon. We describe a thoroughly documented case of an orbital arteriovenous fistula with symptoms exclusively contralateral to the arterial source, a rarer entity. A carotid angiography performed on a patient who presented a red chemotic and proptotic left eye showed a shunt between the meningeal branches of the right internal carotid artery and a left orbital vein.