The lymph nodes in the pelvis lie along the internal, external and common iliac arteries (the main blood vessels that supply blood to the lower abdomen and trunk of the body). The 3 main groups of pelvic lymph nodes are:
internal iliac lymph nodes
external iliac lymph nodes
common iliac lymph nodes
https://www.cancer.ca/en/cancer-information/diagnosis-and-tr...I don't follow your reasoning Liz.
You seem to say that "ilio" relates to "ilion", which is the "ilium" in English, and "iliac" means of or relating to the "ilium" - so why not "iliac"? The reference above seems pretty clear to me.