title: Endovascular treatment of hemifacial spasm associated with a petrosal DAVF using transarterial Onyx embolization. A case report.
abstract: This paper reports that decompression of the facial nerve by transarterial Onyx embolization may relieve hemifacial spasm (HFS) caused by dilated veins due to a right petrosal dural arteriovenous fistula (DAVF).  A 56-year-old man suffered severe chronic right HFS associated with a dilated right petrosal vein lying in the vicinity of the facial nerve.  The right petrosal DAVF was reached through the middle meningeal artery using a transfemoral arterial approach and was occluded with Onyx 18 (M.T.I.- ev3, Irvine, CA, USA). There was complete remission of HFS without recurrence after two months of follow-up. This case supports vascular compression in the pathogenesis of HFS and suggests that facial nerve injury caused by a DAVF could be treated with transarterial Onyx embolization.
authors.affiliation: The First Affiliated Hospital of Henan Science and Technology University, Luoyang, Henan, China.
authors.forename: T
authors.initials: T
authors.lastname: Li
authors.forename: X
authors.initials: X
authors.lastname: Lv
authors.forename: Z
authors.initials: Z
authors.lastname: Wu
mesh_terms: D001164:Arteriovenous Fistula / Q000150:complications / Q000000981:diagnostic imaging / Q000628:therapy*; D002533:Cerebral Angiography; D004121:Dimethyl Sulfoxide / Q000627:therapeutic use*; D004388:Dura Mater / Q000098:blood supply*; D004621:Embolization, Therapeutic / Q000379:methods*; D019569:Hemifacial Spasm / Q000209:etiology / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011145:Polyvinyls / Q000627:therapeutic use*
chemical_list: C450660:Onyx copolymer; D011145:Polyvinyls; D004121:Dimethyl Sulfoxide