Following further investigation, the team found that EZH2 inhibitors increased the expression of MAD2L2 and rendered HR‐proficient epithelial ovarian cancer (EOC) sensitive to poly (adenosine diphosphate‐ribose) polymerase (PARP) inhibitors, dependent on CARM1. The gene discussed is CARM1; the disease is malignant epithelial tumor of ovary.