In the process of EMT in tumour cells, special markers of epithelial cells such as E‐cadherin are down‐regulated, causing a loss of the epithelial features and a acquire of some mesenchymal features.12 When cancer cells undergoing EMT, the tumour cells locally infiltrate and distantly migrate, which ultimately leads to a decrease in patient survival rate.13 In ovarian cancer, EMT is thought to be involved in the metastasis and be predicted of poor prognosis, the reduction in E‐cadherin on the cell surface is closely correlated with poor overall survival of patients with ovarian cancer.14 This evidence concerns the gene CDH1 and ovarian cancer.