title: An unusual, duplicate origin of the anterior choroidal artery with aneurysm: a case report.
abstract: BACKGROUND
  Aneurysms of the anterior choroidal artery (AChoA) are rare and often difficult to treat. Variations may be present and must be identified prior to treatment. We report a unique case of a ruptured aneurysm located at the origin of a duplicate branch of the AChoA.
  
  
  METHODS
  A 56-year-old male was admitted to our university hospital for coma. A brain CT scan showed a subarachnoid hemorrhage, and CT angiography revealed a duplication of the right AChoA, with an aneurysm located at the branch's origin. We decided to embolize this aneurysm. Four weeks later, our patient was able to transfer to the rehabilitation unit.
  
  
  CONCLUSIONS
  To the best of our knowledge, this is one of the first descriptions of an aneurysm located at the origin of a duplicate branch of the AChoA.
authors.affiliation: Department of Neurosurgery, Amiens University Hospital, Avenue René Laënnec, Salouël, 80054, Amiens Cedex 1, France. louis.chenin@neurochirurgie.fr.
authors.forename: Louis
authors.initials: L
authors.lastname: Chenin
authors.affiliation: Department of Neuroradiology, Amiens University Hospital, Amiens Cedex 1, France.
authors.forename: Cyril
authors.initials: C
authors.lastname: Chivot
authors.affiliation: Department of Neurosurgery, Amiens University Hospital, Avenue René Laënnec, Salouël, 80054, Amiens Cedex 1, France.
authors.forename: Patrick
authors.initials: P
authors.lastname: Toussaint
authors.affiliation: Department of Neuroradiology, Amiens University Hospital, Amiens Cedex 1, France.
authors.forename: Hervé
authors.initials: H
authors.lastname: Deramond
authors.affiliation: Department of Neurosurgery, Amiens University Hospital, Avenue René Laënnec, Salouël, 80054, Amiens Cedex 1, France.
authors.forename: Johann
authors.initials: J
authors.lastname: Peltier
mesh_terms: D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging / Q000628:therapy*; D002536:Cerebral Arteries / Q000002:abnormalities* / Q000000981:diagnostic imaging; D004621:Embolization, Therapeutic; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
keywords: Aneurysm; Anterior choroidal artery; Duplication; Embolization; Subarachnoid hemorrhage