LEFTY2 and ovarian serous adenocarcinoma: As shown in Figure 2, elevated TGF-β4 mRNA expression was related to poor OS and PFS in women with serous ovarian cancer (HR, 1.17; 95% CI, 1.01–1.37; P = 0.04) (HR, 1.23; 95% CI, 1.07–1.42; P = 0.0047) but exhibited no significant relationship with OS or PFS in women with all ovarian carcinoma and women with endometrioid ovarian carcinoma.