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A, MR angiography of the right common carotid artery before carotid artery stent (CAS) placement, showing a severe stenosis of the proximal internal carotid artery.
B, Diffusion-weighted image (DWI) obtained at the same time shows no abnormalities.
C, DWI after CAS with a new ipsilateral lesion in the deep territory of the ipsilateral middle cerebral artery.
