title: True aneurysm on the posterior meningeal artery associated with a dural arteriovenous fistula: case report.
abstract: BACKGROUND
  We report an unusual case of a true dural aneurysm arising from the posterior meningeal artery that fed a symptomatic dural arteriovenous fistula located at the right transverse-sigmoid sinus junction.
  
  
  METHODS
  A 29-year-old right-handed white woman presented with aneurysmal dilatation of hypertrophied posterior meningeal artery feeding a partially treated dural arteriovenous fistula.
  
  
  METHODS
  The aneurysm, which measured approximately 3 mm in width and 5 mm in length, was located in the intracranial space with a thin-walled dome projecting toward the cerebellum. Its afferent and efferent vessels were identified, secured, and the lesion was excised en bloc.
  
  
  CONCLUSIONS
  A thorough evaluation of all diagnostic studies should be performed for patients with vascular malformations to help identify these or other unusual lesions that may aid in the risk stratification process and management plan.
authors.affiliation: Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA.
authors.forename: Kenji
authors.initials: K
authors.lastname: Muro
authors.forename: Joseph G
authors.initials: JG
authors.lastname: Adel
authors.forename: Numa R
authors.initials: NR
authors.lastname: Gottardi-Littell
authors.forename: Christopher C
authors.initials: CC
authors.lastname: Getch
authors.forename: H Hunt
authors.initials: HH
authors.lastname: Batjer
mesh_terms: D000328:Adult; D020785:Central Nervous System Vascular Malformations / Q000209:etiology* / Q000473:pathology* / Q000601:surgery; D003392:Cranial Sinuses / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D006984:Hypertrophy / Q000150:complications / Q000473:pathology / Q000503:physiopathology; D002532:Intracranial Aneurysm / Q000150:complications* / Q000473:pathology* / Q000601:surgery; D008576:Meningeal Arteries / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D011859:Radiography; D016896:Treatment Outcome