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Related Experiment Videos

Anomaly of bilateral persistent sciatic arteries

Y Tohno1, S Tohno, T Watanabe

  • 1Department of Anatomy, Nara Medical University, Japan.

Kaibogaku Zasshi. Journal of Anatomy
|August 1, 1993
PubMed
Summary
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A rare anatomical variation, persistent sciatic arteries, was found bilaterally in a 91-year-old woman. This finding details the artery

Area of Science:

  • Anatomy
  • Vascular Anatomy
  • Human Anatomy

Background:

  • The sciatic artery is typically an embryonic vessel that regresses during development.
  • Persistent sciatic artery is a rare congenital anomaly where this embryonic artery fails to regress.
  • Understanding variations in lower limb vasculature is crucial for surgical planning and interpreting imaging studies.

Observation:

  • A bilateral occurrence of the persistent sciatic artery was identified during routine cadaveric dissection.
  • The persistent sciatic arteries originated from the internal iliac arteries, traversed the infrapiriform foramen, and descended through the posterior thigh.
  • Each persistent sciatic artery coursed between the tibial and common peroneal nerves, alongside the sciatic vein, terminating by anastomosing with the popliteal artery.

Findings:

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  • The sciatic nerves bilaterally divided within the pelvis into tibial and common peroneal nerves.
  • The tibial nerve passed through the infrapiriform foramen.
  • The common peroneal nerve perforated the piriformis muscle.

Implications:

  • This case highlights the importance of recognizing rare vascular anomalies in anatomical studies.
  • Knowledge of persistent sciatic arteries is vital for vascular surgeons and interventional radiologists to avoid misdiagnosis and complications.
  • Such anatomical variations can influence surgical approaches and diagnostic interpretations in the lower limb.