Fig. 1

Lower extremity angiography and multislice computed tomography (MSCT) at the first hospitalization. a Lower extremity angiography in January 2019. The right external iliac artery was occluded (white arrow), and the right superficial and deep femoral arteries were also occluded. The right femoral artery was mainly maintained by collateral flow from the right internal iliac artery. b After aortofemoral and femoropopliteal bypass grafts