CEACAM6 and yolk sac tumor: The amount of CEACAM6 in ovarian cancer was highest in mucinous adenocarcinoma (5.6 ± 1.7) > transitional cell (3.8 ± 1.6) > endometrioid (3.6 ± 2.8) > clear cell (3.4 ± 1.8) > yolk sac tumors (2.5 ± 0.5).