It is an abnormal communication between the cavernous sinus and the carotid artery system, 25% of them originate spontaneously, considering arteriosclerosis as an important factor and 75% can be associated with trauma (presence of a pulsatile exophthalmos) in mostly young patients. It can be iatrogenic then transsphenoidal pituitary and ethmoid sinus surgery.

Treatment: a) conservative b) through compressions c) interventional treatment, with different procedures depending on the approach route and the embolization material used.