title: Dural arteriovenous malformations of the ethmoidal region: report of two cases.
abstract: Dural arteriovenous malformations of the ethmoidal region are extremely rare. They are usually supplied by the ipsilateral anterior ethmoidal artery with contralateral contribution in about half of the cases. They are characterized by a fistulous nidus within the dura, and their progression seems to involve a retrograde leptomeningeal vascular stasis with formation of varices and venous aneurysms. They have more propensity to rupture than dural malformations in other locations. Two patients who presented with an acute frontal hemorrhage are reported.
authors.affiliation: Department of Neurosciences, Sir Mortimer B. Davis, Jewish General Hospital, McGill University, Montreal, Quebec, Canada.
authors.forename: J A
authors.initials: JA
authors.lastname: Espinosa
authors.forename: G
authors.initials: G
authors.lastname: Mohr
authors.forename: F
authors.initials: F
authors.lastname: Robert
mesh_terms: D002533:Cerebral Angiography; D002543:Cerebral Hemorrhage / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D004388:Dura Mater / Q000098:blood supply*; D005260:Female; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009131:Muscle, Smooth, Vascular / Q000473:pathology; D009460:Neurologic Examination; D011183:Postoperative Complications / Q000473:pathology / Q000601:surgery; D012086:Reoperation; D014057:Tomography, X-Ray Computed