Persistent sciatic artery presenting as blue toe: Diagnostic dilemma

A persistent sciatic artery (psa) results from lack of regression of the fetal arterial blood supply of the leg and is often combined with an abnormally developed superficial femoral artery. here in we would like to present a 63 year old woman presenting for the first time with blue toe and on further evaluation diagnosis of psa was made. our case illustrates that a complete physical examination and comprehensive evaluation of the peripheral arterial system of the lower limb including possible persistence of sciatic artery is essential in patients presenting as blue toe before embarking on a surgical or other type of interventional procedure.