CD4 and cervical squamous intraepithelial neoplasia: In our study, we found that the percentages of CD4+CD25+CD127lo/- Treg in CD4+ T cells in the UCC group, the CIN group and the control group were (6.43 ± 1.04)%, (6.13 ± 1.23)% and (3.78 ± 0.70)%, respectively.