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Fig. 3A —21-year-old man who sustained head trauma 5 months previously
presenting with proptosis in left eye secondary to direct
carotid–cavernous fistula. Correlation between CT angiographic and
conventional angiographic findings is excellent. Unenhanced CT scan shows
dilated left superior ophthalmic vein (SOV) and asymmetric engorgement of left
cavernous sinus (arrow).