At the same time, we used the TCGA database to analyze correlations between PSAT1, KIF23, CCNE1, MCM4 and clinical pathological parameters, finding that their expression levels in serous endometrial cancer are significantly higher than in endometriod endometrial carcinoma, suggesting that these four RNAS could also be used as molecular biomarkers of EC. Here, MCM4 is linked to endometrial carcinoma.