The median of EP2 staining percentage score was 30% in cervical cancer patients with FIGO I (n = 64), 15% in patients with FIGO II (n = 49), 30% in patients with FIGO III (n = 37) and 30% in patients with FIGO IV (n = 7, Fig. 1e). This evidence concerns the gene PTGER2 and cervical carcinoma.