Objectives: The authors analyzed the clinical, neuroimaging outcomes and complications that occur 1 or more years of patient with cerebral arteriovenous malformation after Gamma Knife radiosurgery, focusing on the analysis of the oblitergation rate depending on the AVM volume. Methods: Between 2006 and 2011, 406 prospective patients with cerebral AVMs were treated with Gamma Knife radiosurgery (GKRS) and follow up by R tatistical analysis. Of these patients, 272 cases were followed up for ≥1 years.