Expression levels of IL-8 protein are associated with cervical carcinoma progression determined using immunohistochemical staining. Strong immunostaining of IL-8 was presentin (A) Grade 1 (magnification, ×50), (B) grade 1 (magnification, ×200), (C) grade 2 (magnification, ×200) and (D) grade 3 (magnification, ×200) uterine cervical cancer tissue. Weak immunostaining of IL-8 was present in (E) normal uterine cervical tissue (magnification, ×50) and (F) normal uterine cervical tissue (magnification, ×200). IL, interleukin.