Can J Ophthalmol
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Arteriovenous malformations (AVMs) of the brain usually present with acute hemorrhage or epilepsy. Of 54 patients with AVMs limited to the posterior cerebral hemispheres some 60% had intermittent or acute visual symptoms. ⋯ Because of the possible neurologic consequences of an AVM it is important to distinguish the headaches and visual symptoms of this lesion from those of classic migraine, a more common condition. In this paper this differentiation and the pathogenesis of the symptoms are reviewed.