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Fig. 6B. —Right internal carotid artery dissection in 42-year-old woman with right-sided neck pain and oculosympathetic paresis (Horner's syndrome). Three-dimensional reconstruction from CT angiogram of right internal carotid artery shows long segment of arterial narrowing (arrows) beginning distal to carotid bifurcation. Note more focal segment of narrowing (arrowhead) in mid portion of stenosis.