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  • Title: [A case of migraine presenting with thunderclap headache associated with posterior reversible encephalopathy syndrome].
    Author: Katoh H, Saito Y, Ohwan Y, Kasai H, Fujita K, Kawamura M.
    Journal: Brain Nerve; 2014 Oct; 66(10):1225-9. PubMed ID: 25296877.
    Abstract:
    We report a 47-year-old woman who developed a thunderclap headache. Head axial, fluid-attenuated inversion recovery magnetic resonance imaging (FLAIR MRI) revealed high signal lesions in the left occipital and right parietal lobes. Apparent diffusion coefficient mapping showed a vasogenic edema pattern. Upon admission, the patient's blood pressure was normal and the neurological examination was unremarkable. As thunderclap headaches are associated with a repeated rise in blood pressure, we considered cerebral vasoconstriction and administered a calcium channel blocker. Thereafter, her headache with high blood pressure eased significantly and the high signal lesions on FLAIR MRI disappeared. We diagnosed the condition as posterior reversible encephalopathy syndrome (PRES). In addition, head magnetic resonance angiogram showed vasoconstriction of the right anterior cerebral artery, left middle cerebral artery, and bilateral posterior cerebral artery. Calcium channel blocker use was continued and vasoconstriction improved by day 70. In this case, the presenting symptom was thunderclap headache, which is a characteristic feature of reversible cerebral vasoconstriction syndrome (RCVS). Therefore, PRES may be caused by RCVS.
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