SPONTANEOUS THROMBOSIS OF A CEREBRAL ARTE RIOVENOUS MALFORMATION

Complete disappearance of a cerebral arteriovenous malformation (AVM), 9 years after its decovery, is reported in a 45-year-old man. This un usual evolution was revealed by the onset of 3 seizures. CT scan and M R imaging eliminated any hemorrhage and carotid angiography showed the spontaneous thrombosis of the whole malformation. The evolution of th e MRI signals demonstrates that seizures and the disappearance of the AVM were concomittant. it is suggested that the spontaneous thrombosis of the venous drainage caused the AVM disappearance with cerebral oed ema responsible of seizures.