Interventional neuroradiology continues to play an increasing role in the treatment of intracranial aneurysms, the treatment of vasospasm related to subarachnoid hemorrhage, and the treatment of vascular malformations and fistulae of the brain and spine. New techniques for aneurysm embolization are examined, such as detachable coil systems, as are reports of intracranial angioplasty and superselective papaverine infusion for vasospasm following aneurysm rupture. Results of investigations of arteriovenous malformation embolizations and recent analyses of risk factors associated with arteriovenous malformations are discussed. New approaches to tumor embolization are presented, and there are new data on angioplasty for cerebral atherosclerotic disease. Local fibrinolytic therapy in the treatment of patients with acute intracranial arterial or venous sinus thrombosis is evaluated.