TNFRSF11B and ovarian serous adenocarcinoma: In addition, the analysis showed statistical significance between OPG concentration depending on the degree of histological differentiation in women with serous ovarian cancer between G1 and G3 (p < 0.01), and in women with mucinous cancer between G1 and G3 (p < 0.01) and G2 and G3 (p < 0.01).