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FIG 2. MR angiographic findings of dural arteriovenous fistula in a 41-year-old woman with progressive visual disturbance.
Flow-related enhancement of a fistula (white arrowheads) and the sigmoid sinus (white arrows) are seen on frontal and lateral 3-D TOF MRA maximum-intensity-projection views (A and B). Source image of MR angiography (C) well visualizes the fistula (white arrowhead) and sinus (white arrows) with flow-related enhancement. Lateral projection occipital angiogram (D) reveals a sigmoid sinus fistula with transosseous dural feeders (arrowheads), leptomeningeal venous drainage (black arrow), and sinus stenosis (double arrowheads). A fundoscopic examination obtained 3 months before (E) and after (F) the first session of endovascular treatment reveals papilledema (open arrows) and optic disk atrophy (double arrows). This patient eventually lost ipsilateral visual acuity and kept the contralateral visual acuity unchanged.
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