FIGURE.

A, Flair axial section showing right ACA and MCA territory cortical infarct and multiple discrete MCA-ACA watershed infarct on the left side. B, DSA, showing tight stenosis of the distal ICA, with concomitant narrowing of proximal MCA and ACA, with leptomeningeal collaterals. C, Axial T1 noncontrast, HRVWI, showing circumferential wall thickening (arrow) and narrowing of the lumen of right distal ICA. D, Axial T1 contrast-enhanced, HRVWI, showing circumferential grade II enhancement (arrow) of a right distal ICA (Note:—Enhancement is graded by comparing with pituitary infundibulum).