Aneurysms in twig-like middle cerebral artery

Cerebrovasc Dis. 2005;20(1):1-5. doi: 10.1159/000086119. Epub 2005 May 30.


Background: We report a vascular abnormality of the middle cerebral artery (MCA) that has not been described in the literature before.

Methods: Two patients (1 male and 1 female; age 44 and 67 years, respectively) were found to have a vascular abnormality in which the main trunk of the MCA had a twig-like form. Both patients presented with intracranial hemorrhage.

Results: In these 2 patients, the abnormality was seen before the genu of the MCA. They had an intracranial hemorrhage due to an associated aneurysm inside the twigs. The twig appeared to be a network between the bifurcation of internal carotid artery and insular segment of MCA, and it was different from the collateral circulation due to acquired occlusion or moyamoya disease.

Conclusion: This new type of vascular lesion of the MCA is not benign. It appears to be associated with the occurrence of an aneurysm, an important clinical aspect.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Aged
  • Female
  • Humans
  • Intracranial Aneurysm / diagnostic imaging*
  • Intracranial Aneurysm / surgery
  • Magnetic Resonance Angiography
  • Male
  • Middle Cerebral Artery / abnormalities*
  • Tomography, X-Ray Computed
  • Treatment Outcome