PURPOSE: The purpose of this study was to analyze the angioarchitectures of cerebral arteriovenousmalformation(AVM) and to determine whether there was correlation between angioarchitectures and patterns ofintracranial hemorrhage(intracerebral, intraventricular, and both) in cerebral AVM. MATERIALS AND METHODS: Onehundred and twenty-eight patients who between November 1989 and December 1994 suffered supratentorial AVM withintracranial hemorrhage were studied retrospectively. Among 128 patients, intracerebral and intraventricularhemorrhage were seen in 68 (53%) and 24 patients (19%), respectively, while both types were seen in the remaining36 (28%). We analyzed the angioarchitectual characteristics of AVM. namely nidi, feeding arteries and drainingveins, in three hemorrhagic groups of patients with intracerebral hemorrhage, intraventricular hemorrhage andboth. The kappa2 test or Fisher's exact test was used for statistical analysis. RESULTS: A cortically located niduswas most common in patients with intracerebral hemorrhage, while a periventricular location was most common inthose with intraventricular hemorrhage (p<0.001). Location in the corpus callosum, choroid plexus, orintraventricular area was more frequent in the intraventricular than the intracerebral hemorrhagic group (p<0.05). Superficial venous drainage was most common in patients with intracerebral hemorrhage (p<0.001), and deep venousdrainage in those with intraventricular hemorrhage (p=0.001). CONCLUSION: The angioarchitectual characteristicsof cerebral arteriovenous malformation correlate significantly with patterns of intracranial hemorrhage, andawareness of the type of hemorrhage could help to manage patients and determine prognosis.