Carotid cavernous fistulas (CCF) are mostly post-traumatic and are due to a tear of the internal carotid artery (ICA) inside the cavernous sinus. The improvement of endovascular techniques with venous approach enables the preservation of internal carotid artery patency in most cases when detachable balloons fail in order to reconstruct and repair the tear in the ICA. The case described here has a giant aneurysmatic dilatation of the cavernous sinus and inferior petrosal sinus. We associate coils and Onyx to occlude the lesion preserving and repairing the large hole of the fistula.
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