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Primitive vertebrobasilar system associated with a ruptured aneurysm.

Kenji Yagi1, Koichi Satoh, Junichiro Satomi

  • 1Department of Neurosurgery, School of Medicine, University of Tokushima, Tokushima, Japan.

AJNR. American Journal of Neuroradiology
|May 14, 2004
PubMed
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Persistent primitive lateral vertebrobasilar (PPLVB) anastomosis is a rare fetal remnant. This case presents a unique variant where PPLVB primarily supplied the basilar artery due to underdeveloped vertebrobasilar junctions, potentially leading to aneurysmal rupture.

Area of Science:

  • Neurology
  • Vascular Anatomy
  • Embryology

Background:

  • Persistent primitive lateral vertebrobasilar (PPLVB) anastomosis is an exceedingly rare remnant of early human embryonic development.
  • Previous reports of PPLVB occurrence are exceptionally scarce, with only one documented instance.

Observation:

  • This study details a novel variant of PPLVB.
  • In this variant, the basilar artery received its primary blood supply from the PPLVB anastomosis.
  • This occurred due to contralateral incomplete development and ipsilateral aplasia of the vertebrobasilar junction.

Findings:

  • The vertebrobasilar junction exhibited asymmetrical development, with one side being hypoplastic and the other aplastic.
  • The PPLVB served as the dominant feeder vessel for the basilar artery in this unique anatomical configuration.

Related Experiment Videos

Implications:

  • The abnormal hemodynamic stress within this variant PPLVB may predispose individuals to aneurysmal formation and rupture.
  • Understanding such rare vascular anomalies is crucial for accurate diagnosis and management of cerebrovascular diseases.