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Bilateral Persistent Sciatic Veins: A Cadaveric Case Report.

Renna Higa1, Aya Han2, Yoko Tabira2

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Summary

This study reports a rare case of bilateral persistent sciatic veins (PSVs) found during anatomical dissection. Awareness of this anomaly is crucial for surgical planning and preventing complications in lower limb procedures.

Keywords:
Klippel-Trenaunay syndromeanatomical variationdeep femoral veinfemoral veinpersistent sciatic veinremnant vein

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Area of Science:

  • Anatomical Variations
  • Vascular Anatomy
  • Human Anatomy

Background:

  • Persistent sciatic veins (PSVs) are rare congenital anomalies.
  • While often associated with Klippel-Trenaunay syndrome, PSVs can occur in isolation.
  • Understanding variations in PSV anatomy is clinically significant.

Purpose of the Study:

  • To document a unique case of bilateral persistent sciatic veins.
  • To describe the distinct anatomical course of PSVs on each side.
  • To highlight the clinical importance of recognizing PSVs in surgical and radiological interventions.

Main Methods:

  • Anatomical dissection of a human cadaver.
  • Detailed observation and documentation of venous structures in the lower limbs.
  • Comparison of the bilateral persistent sciatic veins' pathways.

Main Results:

  • Bilateral persistent sciatic veins were identified, with no other Klippel-Trenaunay syndrome features.
  • The left PSV coursed through the intramuscular space caudal to the quadratus femoris, joining the deep femoral vein.
  • The right PSV followed a lower intermuscular path between the adductor magnus and adductor minor, merging directly with the femoral vein.

Conclusions:

  • Persistent sciatic veins represent a significant anatomical variation that can mimic or be mistaken for other conditions.
  • Accurate diagnosis of PSVs is essential to prevent intraoperative bleeding and other procedural complications.
  • Clinicians must maintain awareness of this rare anomaly for improved patient outcomes during lower extremity interventions.