Carotidocavernous Fistula

Crohns Fistulas

Fig. 13.19a This T1-weighted MR image of the skull base displays a large signalfree structure posterior to the right orbit. It is a large vessel segment that certainly does not belong there. b A subtraction angiography is performed by administering contrast via a catheter into the right common carotid artery—you can see the catheter tip—and subtracting the precontrast image from the postcontrast images. An enormous dilatation of an artery in the cavernous sinus with early venous drainage is documented. This is indicative of a carotidocavernous fistula. c To close the fistula, it is filled with detachable balloons. The rest of the vascular lumen will hopefully thrombose later, but the early venous drainage has already stopped. d After the intervention, the subtraction shows a normalized vascular flow.

I Meningioma

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