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Fig. 1 —39-year-old woman with acute hemiparesis of left side of body and mild dysarthria. Coronally reformatted CT angiogram of right and left internal carotid arteries shows string-of-beads appearance of right internal carotid artery (arrowheads). Left internal carotid artery (curved arrow) is normal. Signs of atherosclerosis, especially at level of carotid bifurcation (straight arrow), are absent.