Abstract
The venous sinuses commonly found in the margins of the diaphragm and sella are venous interconnections between the bilateral cavernous dural sinuses and are termed intercavernous communications or intercavernous sinuses. They form a venous ring, a single "circular sinus" that extends throughout the skull base. We report the first case to our knowledge of an intercavernous sinus fistula. We emphasize the importance of thorough knowledge of lesion characteristics before considering any interventional procedure.An 84-year-old woman presented with alarming progressive orbital symptoms for one month affecting her left eye. A cerebral angiogram showed an intercavernous sinus fistula supplied by internal and external carotid arterial branches.Transvenous embolization through retrograde catheterization of the right inferior petrosal sinus allowed complete coil occlusion of the lesion. Cerebral angiography confirmed the absence of residual blood flow through the fistula.This report represents the first case of an intercavernous sinus dural arteriovenous fistula successfully treated with transvenous embolization. A detailed awareness of the regional anatomy is essential for treatment approach and favorable outcomes.