Persistent sciatic vein

Abstract

Background: Venous anomalies of the lower extremity are a challenge when found as rare variations. Physicians should be aware of morphological variations in this region for correct diagnosis and management of diseases such as deep vein thrombosis. Materials and methods:During the routine dissection of the lower extremities of a Caucasian male cadaver, a case of persistent sciatic vein was found.Results: A persistent sciatic vein originating from the saphenopopliteal junction coursed proximally and laterally to enter into the adductor magnus muscle, at the right side.Running through the fibers of the adductor magnus anteriorly, the variant vein drained into the deep femoral vein just medial to the vastus medialis muscle. Conclusions:As being a rare congenital vascular anomaly, the persistent sciatic vein should be correctly diagnosed and defined during the radiologic assessments, surgical interventions and blockades for better outcomes and lesser complications.

Persistent Sciatic Veins

“…9 The significant findings in the deep venous system are aplasia or hypoplasia of the femoral vein associated with persistence of the sciatic vein, serving as a compensatory pathway for venous flow. 2 In our hospital, from 2017 to 2021, persistence of the sciatic vein was observed 7 times, all in patients without KTWS. Four cases were associated with venous reflux of more than 1 second, with varices on the posterior aspect of the thigh, knee, and leg.…”

“…9 The significant findings in the deep venous system are aplasia or hypoplasia of the femoral vein associated with persistence of the sciatic vein, serving as a compensatory pathway for venous flow. 2…”

“…Thus, when we notice an anatomical variation of the femoral vein, such as a decrease in diameter, duplication, or distal hypoplasia, we should be aware of the increased possibility, especially in patients with KTWS. 2…”

“…Therefore, we observe 2 large veins in the posterior musculature of the thigh (the femoral vein and persistent sciatic vein), except in cases where there is hypoplasia of the femoral vein in its distal third. 2…”

“…1 The exact prevalence is unknown but is estimated to be between 0.7% and 9%. 2 We report a case of bilateral persistent sciatic veins in a patient with no KTWS. Our report also suggests diagnostic sonographic features for the persistent sciatic vein, which should not be confused with the sciatic vein, the usual drainage vein.…”