[Dura mater arteriovenous fistula and lateral sinus occlusion]

It is rare to find an arteriovenous fistula of the dura mater associated with a venous sinus occlusion, but this may provide evidence of an etiology. In the case reported, the malformation was probably of congenital origin, the sinus thrombosis having occurred secondarily to the venous stasis adjacent to the fistula.