Vertex epidural hematoma associated with traumatic arteriovenous fistula of the middle meningeal artery: A case report

BACKGROUND Vertex epidural hematomas are rare. We describe the features of a vertex epidural hematoma associated with an arteriovenous fistula (AVF) o f the meningeal artery created by a laceration of the dura mater underlying a linear skull fracture. Although AVF associated with convexity epidural h ematomas has been reported, we know of no such previous report of vertex ep idural hematomas. CASE DESCRIPTION A 65-year-old woman presented with generalized headache fo llowing head injury. On hospital day 3, she developed a left hemiparesis. M agnetic resonance imaging (MRI) disclosed a thick epidural hematoma at the vertex. Cerebral angiography showed an AVF between the middle meningeal art ery and a venous lake. On hospital day 4, the epidural hematoma was evacuat ed. CONCLUSION Although coronal MRI was important for diagnosis of this vertex epidural hematomas, the case particularly illustrates the importance of cer ebral angiography. The delayed onset of hemiparesis most likely reflected a continuing increase in hematoma volume because of bleeding from the lacera ted meningeal artery. (C) 2001 by Elsevier Science Inc.