Abstract
Arteriovenous fistulas correspond to a rare type of cerebral vascular malformation, consisting of a direct connection between the meningeal arteries and the dural venous sinuses or leptomeningeal veins. They represent between 10-15% of cerebral vascular malformations. The main clinical picture of presentation is incidental, however, the symptoms can vary from mild symptoms such as tinnitus to cerebral hemorrhage. The formation of this systemic entity is attributable to different factors, among which are the release of proangiogenic factors, increased microthrombotic activity, increased expression of fibroblast growth factor and endothelial growth factor. The first-line diagnostic method is computed tomography, the gold standard is digital subtraction angiography.
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