UNCOMMON SYMPTOMATIC CEREBRAL VASCULAR MALFORMATIONS

We describe three cases of unusual vascular malformations in which the most relevant angiographic findings were the presence of a pathologic arteriovenous shunt through multiple small direct arteriovenous fistu las and the lack of a clearly identifiable nidus. All malformations we re symptomatic. Such lesions are relatively rare, but they should be t aken into consideration in the differential diagnosis of cerebrovascul ar malformations.