title: Giant aneurysm at the origin of the accessory middle cerebral artery.
abstract: BACKGROUND
  Aneurysms of the A1 portion of the anterior cerebral artery are rare. The accessory middle cerebral artery is also a rare anomalous artery.
  
  
  METHODS
  We operated on a 53-year-old man because of a giant aneurysm which arose at the junction of the accessory middle cerebral artery and the horizontal portion of the anterior cerebral artery (A1 portion).
  
  
  CONCLUSIONS
  This is the first report of a giant aneurysm of that region. A detailed evaluation of the angiogram is necessary prior to the operation, in order to select the most appropriate operative method to secure the blood flow of the accessory middle cerebral artery and distal anterior cerebral artery.
authors.affiliation: Department of Neurosurgery, Kurume University, School of Medicine, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Sugita
authors.forename: T
authors.initials: T
authors.lastname: Yuge
authors.forename: J
authors.initials: J
authors.lastname: Miyagi
authors.forename: N
authors.initials: N
authors.lastname: Fujimura
authors.forename: M
authors.initials: M
authors.lastname: Shigemori
mesh_terms: D002533:Cerebral Angiography; D002536:Cerebral Arteries / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008875:Middle Aged