CD4 and neoplasm: The infiltration of naive B cell, resting memory CD4 T cells and activated mast cells were decreased in EC tissues, but the infiltration of memory B cell, activated memory CD4 T cells, T follicular helper cells, regulatory T cells, M0 macrophage, M1 macrophage, resting myeloid dendritic cells, activated myeloid dendritic cells and eosinophil were increased in tumor tissues of EC.