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Fig. 3B —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. CT angiograms from superior to inferior planes show left proptosis. Left superior ophthalmic vein (SOV) is markedly dilated throughout its course. Left facial vein (FV) and angular veins (arrow, C) that communicate with left superior ophthalmic vein are dilated. Engorgement of left cavernous sinus is evident. OA = ophthalmic artery.