[Ophthalmoplegic migraine: value of magnetic resonance]

Ophthalmoplegic migraine is a rare entity, usually starting in childhood, and characterized by recurrent episodes of migrainous headaches associated with an oculomotor cranial nerve palsy, most commonly affecting the third nerve. Its physiopathology remains unknown, but the most recent theory, that considers it as a neuropathy, has led to its inclusion in the last International Headache Classification into the group of neuralgias. Diagnosis is reliant on clinical grounds and the exclusion of other disorders. The characteristic finding of enlargement and enhancement with contrast of the cisternal portion of the oculomotor nerve, observed in Magnetic Resonance Imaging (MRI) has supported its diagnosis. We describe a clinically compatible case, supported by typical MRI images that progressed favourably following corticoids treatment.