The prognosis of cervical cancer is closely related to its stages ,while the current FIGO clinical stage is too subjective , for example different gynecologic oncologists may give different diagnosis to the same patient. MRI, CT, PET/CT imaging examinations are commonly used as a referrence for clinical staging, but the sensitivity and specificity are not satisfied. In addition, lymph node metastasis significantly impacts the prognosis of cervical cancer . However, the lymph node invasion is not in current staging criteria.