title: Fenestrated oculomotor nerve caused by internal carotid-posterior communicating artery aneurysm: case report.
abstract: OBJECTIVE
  The fenestrated oculomotor nerve associated with the internal carotid-posterior communicating artery aneurysm is very rare.
  
  
  METHODS
  A 48-year-old woman had a history of subarachnoid hemorrhage caused by a ruptured right middle cerebral artery aneurysm, which was wrapped with good postoperative course. Twenty years later, the patient suffered frontal headache with a mild oculomotor nerve paresis in the right side. Follow-up neuroimaging studies demonstrated a de novo right internal carotid-posterior communicating artery aneurysm.
  
  
  METHODS
  The aneurysm was exposed and clipped via a right pterional route. The fenestrated oculomotor nerve associated with the aneurysm was confirmed at surgery.
  
  
  CONCLUSIONS
  We speculated that the fenestration was most likely caused, by the growth of the aneurysm.
authors.affiliation: Department of Neurosurgery, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Horiuchi
authors.forename: K
authors.initials: K
authors.lastname: Kyoshima
authors.forename: F
authors.initials: F
authors.lastname: Oya
authors.forename: S
authors.initials: S
authors.lastname: Kobayashi
mesh_terms: D002340:Carotid Artery Diseases / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002533:Cerebral Angiography; D003389:Cranial Nerve Diseases / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D009802:Oculomotor Nerve / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*