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Fig. 2D. —50-year-old woman with peripheral vascular malformation of right ear. Dynamic contrast-enhanced subtraction MR image, obtained at same level as A and B 3 sec later than C, shows arterial enhancement (arrowhead) and more intense lesion enhancement (arrow). This lesion was categorized on MR imaging as arterial or arteriovenous malformation on basis of early lesion enhancement and presence of flow voids.