Associations analysis showed that neither COX-2 nor iNOS expression was associated with patient age, tumor size, or HPV infection (all p values >0.05); however, both COX-2 and iNOS expressions were positively correlated with lymph node metastasis and FIGO stage (Table 2) (p < 0.05). This evidence concerns the gene PTGS2 and metastatic malignant neoplasm in the lymph nodes.