This case report describes surgical treatment in a sciatic artery aneu
rysm with hypoplastic external iliac and femoral arteries. An obturato
r bypass grafting procedure from the internal iliac artery to the dist
al sciatic artery was performed after aneurysmal exclusion was achieve
d by proximal and distal ligation. This method offers an acceptable op
tion for surgery in some types of sciatic artery aneurysms.