Transvenous embolization through the ipsilateral deep facial vein: A novel approach route for treatment of a cavernous sinus dural arteriovenous fistula oleh Tomoaki Nakai, MD, PhD, Atsushi Fujita, MD, PhD, Akitsugu Morishita, MD, PhD, Hideo Aihara, MD, PhD, Eiji Kohmura, MD, PhD