External iliac artery Endofibrosis in a professional cyclist.

We present a case of a 30-year-old female professional cyclist who presented with right thigh claudication while performing high-intensity efforts. Based on the typical clinical history and the presence of a smooth long segment diffuse narrowing in the right external iliac artery on non-contrast magnetic resonance angiography, a diagnosis of external iliac artery endofibrosis or "cyclist's iliac syndrome" was made. Supplementary Information: The online version contains supplementary material available at 10.1007/s12055-022-01349-8.