The efficacy of sodium valproate and a MRA finding in confusional migraine.

Confusional migraine (CM) is recognized as a kind of pediatric migraine equivalent. We report that a 10-year-old girl had repeated attacks of confusional state and of migraine with aura. She suffered from total of six CM attacks and migraine attacks with aura almost once a month. Therefore, sodium valproate (VPA) was initiated to prevent these attacks. They have been controlled after increasing her dosage to 600mg/day. The intracranial magnetic resonance angiography (MRA) during the last CM attack indicated narrowing of left middle and posterior cerebral arteries. However, MRA during the attack free period at 41-day follow-up showed normal vessels. Electroencephalograms showed severe slowing without seizure discharges during the CM attacks. This case indicates that VPA is an effective treatment for the prophylaxis of CM and migraine with aura. MRA is considered helpful for the diagnosis of this kind of migraine in children because of noninvasive neuroimaging.