Dural Arteriovenous Malformation with Vascular Sac Manifesting Subarachnoid Hemorrhage -Report of two cases-

Abstract

Two cases of dural arteriovenous malformation (dAVM) with a vascular sac at the dilated pial vein as a drainer are reported in this paper. The dAVM were located at the anterior cranial fossa in Case 1 and at the petrous portion in Case 2. Both cases had intracranial hemorrhage and, especially in Case 1, the associated vascular sac was thought to be the source of the hemorrhage, for its location was the same as the small intracerebral hematoma. The relationship between the intracranial hemorrhage and cortical drainage are discussed in the paper. The importance of blockade of cortical drainage and occlusion or removal of nidus is stressed for protection against intracranial hemorrhage.