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FIG 1. Case 19. A 78-year-old woman with dAVF in the left CS.
A, Lateral intra-arterial DSA of the left ECA shows the arteriovenous shunt in the left CS (long arrow) and retrograde venous drainage to the superior ophthalmic vein (short arrow) and cerebral cortical veins (arrowheads). Severity of the drainage was grade 2 (26%–50% of cortical veins on angiography).
B, Axial T2-weighted SE MR image shows flow voids (arrows) in the subarachnoid space, suggesting dilated cortical veins in bilateral frontal and parietal lobes.
C, Abnormal dilated cortical veins (arrows) are more prominent on this axial enhanced T1-weighted SE image than in B.
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