Guy et al. [75] observed the enhanced expression of genes related to stemness, including OCT4A, MYC, KRT18 (which encodes CK-18), SOX2, B lymphoma Mo-MLV insertion region 1 homolog (BMI1), ABCG2, NANOG, and NES (which encodes nestin) in CD133-positive and CXCR4-positive endometrial cancer cells. Here, ABCG2 is linked to endometrial cancer.