When the sciatic artery persists, it is usually a tortuous and enlarged vessel.
Aneurysm formation in the persistent sciatic artery occurs in as many as 46% of cases, and may be the first evidence of the presence of the anomaly, causing buttock pain and sometimes sciatic nerve compression with sciatic pain in the affected leg.
The high incidence of aneurysm formation is probably related to repeated external trauma as the persistent sciatic artery is in a relatively vulnerable anatomic position.
Conclusion: A persistent sciatic artery is a rare congenital vascular anomaly that can present with various atherosclerotic complications.
Persistent sciatic artery (PSA) is seen as continuation of the left common iliac artery and hypoplastic left superficial femoral artery (LSFA) is seen.
C) Posterior view three-dimensional reconstruction of the computed tomographic angiogram of the left persistent sciatic artery.