CD4 and cancer: To understand the association between immune infiltrating cells and survival in UCEC, we used the Cox regression equation to calculate the expression levels of CD4+ T cell (HR 0.001, 95%CI 0, 0.052, P = 0.005), CD8+ T cell (HR 0.001, 95%CI 0, 0.052, P = 0.001) and Neutrophil (HR 2314.933, 95%CI 1.836, 2919028.574, P = 0.033), which had declined due to cancer progression (Table 4).