A fistula between a carotid artery and the cavernous sinus (carotid-cavernous fistula, CCF) can occur in a number of conditions.


Conditions associated with a CCF:

(1) head trauma

(2) rupture of a small aneurysm

(3) Ehlers Danlos syndrome

(4) pregnancy

(5) iatrogenic


Rare cases will have no preceding event and can be termed idiopathic.


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