Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40792-021-01274-9/MediaObjects/40792_2021_1274_Fig3_HTML.jpg)
Images from angiographic evaluation by interventional radiology. a Abdominal aortography with inferior mesenteric artery (IMA) balloon occlusion showed developed collateral lumber arteries feeding the lower extremities. b The early phase of IMA selective angiography showed a prominent IMA flow. c In IMA selective angiography, retrograde blood flow of the internal iliac arteries was sustained by IMA blood flow through the collateral mid-rectal arteries