CTNNA1 and ovarian cancer: Five hypermethylated genes (CD97, CTNNA1, DLC1, CD97, and HAPLN2) and three hypomethylated genes (LAMA4, LPP, and MFAP4) are significantly associated with poor recurrence-free survival of ovarian cancer tissues from TCGA (n = 391) using multivariate Cox regression analysis.