A Study of 33 patients with intracranial arteriovenous malformations were done to analyze the relationship between the size of the nidus and the type of arteriovenous malformation, the pattern of hemorrhage, and secondary findings. The diagnosis was established by means of cerebral angiography, which in all cases showed the type and size of the nidus, feeding arteries, and draining veins. In 31 cases, computed tomography was used for the evaluation of hemorrhagic patterns and other findings. Among the findings of computed tomography, the hyperdense lesion on the precontrast scan was most frequently(51.6%) noted. Among the hemorrhagic patterns intracerebral hemorrhage was the most common. Other findings such as mass effect by the hematoma, perilesional low density and calcifications were occasionally noted. The most frequent size was the medium size between 2-4cm. All AVM nidus were of the plexiform type. Intracranial arteriovenous malformation were fed most frequently from the middle cerebral artery and drained in to the surface veins. The associated diseases were thromboses(2 cases)and an atherosclerotic occlusion(1 case) of the common carotid artery, Moyamoya disease(1 case) and an aneurysm of the basilar artery(1 case).