Common iliac lymph nodes
The common iliac lymph nodes, four to six in number, are grouped behind and on the sides of the common [iliac artery], one or two being placed below the bifurcation of the aorta, in front of the fifth lumbar vertebra.
They drain chiefly the internal iliac [lymph nodes|hypogastric] and external iliac glands, and their efferents pass to the lateral [aortic glands].