Interestingly, serum Doppel level was higher among EOCs of serous adenocarcinoma (7.020 ng/mL; n = 39), mucinous (10.780 ng/mL; n = 8), and endometrioid (7.295 ng/mL; n = 7) than clear cell (3.114 ng/mL; n = 7) or other types (4.855 ng/mL; n = 15) (Figure 2E). This evidence concerns the gene PRND and serous adenocarcinoma.