Prolonged hemiplegic migraine.

Hemiplegic migraine is a rare form of migraine variant. It is characterized by recurrent attacks of headache associated with temporary neurological deficit, usually unilateral hemiparesis or hemiplegia. It can be difficult to distinguish from migrainous stroke clinically, and a full neurological work-up and careful review of medical history and symptoms are necessary for the diagnosis. Two forms of hemiplegic migraine are known: familial and sporadic, phenotypically similar, differentiated by the absence of family history of similar attacks in the sporadic form. We report a case of sporadic hemiplegic migraine with unusually prolonged deficit and progression to quadriplegia with complete return to baseline 7 days after onset. Diffusion weighted images helped in excluding infarction.