CD80 and cervical squamous intraepithelial neoplasia: The expression of CD80 and CD86 in the CIN group (CD80: 49.52 ± 21.74%; CD86: 46.92 ± 15.24%) was lower than that of the healthy individuals (CD80: 51.23 ± 17.16%; CD86: 49.02 ± 21.58%), and lowest in patients with cervical carcinoma (CD80: 39.59 ± 17.39%; CD86: 42.54 ± 19.51%).