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FIG 6. Patient 6: 24-year-old woman with primary angiitis of the CNS.
A, Axial SE MR image (1500/30) shows high signal intensity in the left parietal cortex, subcortical white matter (black arrows), and in the left putamen (white arrow).
B, Contrast-enhanced axial SE MR image (550/25) shows vascular and mild parenchymal enhancement (arrows). The vascular stasis is indicative of acute cerebral ischemia.
C, Right internal carotid artery angiogram shows narrowing in the right pericallosal artery (arrowheads). Superimposition of vessels immediately distal to that lesion gives the appearance of an aneurysm.
D, Left common carotid artery angiogram reveals attenuated MCA branches distal to a trifurcation aneurysm (arrowhead).
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