Subarachnoid hemorrhage caused by ruptured posterior inferior cerebellar artery aneurysm arising from the extracranial portion of an anomalous vertebral artery

Neurol Med Chir (Tokyo). 2012;52(7):499-501. doi: 10.2176/nmc.52.499.

Abstract

A 42-year-old woman presented with subarachnoid hemorrhage caused by a ruptured posterior inferior cerebellar artery aneurysm arising from the extracranial portion of an anomalous vertebral artery. We speculated that the aneurysm formed by dissection of the media because of its shape and location. Therefore, the aneurysm was isolated by trapping and excised, with occipital artery to posterior inferior cerebellar artery bypass. Histological examination showed a typical true aneurysm without evidence of dissection. This case suggests that an aneurysm of an anomalous artery is caused by hemodynamic stress and is a true aneurysm, not a dissection.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Aneurysm, Ruptured / diagnostic imaging
  • Aneurysm, Ruptured / pathology*
  • Aneurysm, Ruptured / surgery
  • Central Nervous System Vascular Malformations / diagnostic imaging
  • Central Nervous System Vascular Malformations / pathology*
  • Central Nervous System Vascular Malformations / surgery
  • Cerebral Revascularization / methods
  • Female
  • Humans
  • Radiography
  • Subarachnoid Hemorrhage / diagnostic imaging
  • Subarachnoid Hemorrhage / pathology*
  • Subarachnoid Hemorrhage / surgery
  • Vertebral Artery / abnormalities*
  • Vertebral Artery / diagnostic imaging
  • Vertebral Artery / surgery
  • Vertebral Artery Dissection / diagnostic imaging
  • Vertebral Artery Dissection / pathology*
  • Vertebral Artery Dissection / surgery