Progressive neurological deficits in cerebral arteriovenous malformations

Progressive neurological deficits are uncommonly associated with cerebral a rteriovenous malformations. We present 25 cases (3.54 %) from our series of 705 patients treated by radiosurgery. Common characteristics were preferen tially. large cerebral arteriovenous malformations, arterial steal, arteria l recruitment, venous reflux and deep location. After multivariate analysis , only arterial steal was significantly associated with neurological defici ts Course after treatment tons variable and correlated with cerebral arteriove nous malformations regression. Different pathophysiologic hypotheses and their therapeutic consequences ar e discussed.