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A 51-year-old woman with 90% left internal carotid artery stenosis. Color-coded cerebral DSA demonstrated an ipsilateral atretic transverse sinus in Fig 1. A–C, Prestent MR imaging shows an old infarct in the occipital subcortical white matter. She had headache with nausea 8 hours after the procedure. D–F, MR imaging 12 hours after the procedure shows increased signal intensity over the left occipital subcortical white matter.
