The GG, GC, and CC genotype frequencies of NEIL2 rs804270 were 30.7%, 48.8% and 20.5% in normal healthy controls; 28.3%, 44.5% and 27.3% in CIN III and 23.3%, 42.3% and 34.5% in CSCC, respectively. The gene discussed is NEIL2; the disease is uterine cervix carcinoma in situ.