Including criteria: cervical cancer patients after surgery with big tumor, deep invasion or tumor thrombi in the vascular system, but without lymph invasion, positive surgery margin or parametrium invasion. Patients in this group receive radiation therapy only. radiation therapy regimen: 3D-CRT pelvic radiation, 95%CTV DT 45Gy/25f. Radiation field include tumor bed and regional lymph nodes area. Upper border: branching of abdominal aorta. The radiation fields go down along the iliac vessels (including regions of 7mm out of the iliac vessels) and include the tumor bed region. Lower border: the inferior margin of obturator foramen.

Including criteria: cervical cancer patients after surgery with big tumor, deep invasion or tumor thrombi in the vascular system, but without lymph invasion, positive surgery margin or parametrium invasion. Patients in this group receive concurrent chemotherapy and radiation therapy. radiation therapy regimen is the same with radiation therapy only group. Chemotherapy regimen: Topotecan (1.5mg /m2 d1,2, 1mg d3) and Cisplatin (25mg /m2 d1-3). Chemotherapy will be carry out in the 2nd and 6th week of radiation therapy.

Including criteria: cervical cancer patients after surgery with big tumor, deep invasion or tumor thrombi in the vascular system, but without lymph invasion, positive surgery margin or parametrium invasion. Patients in this group receive concurrent chemotherapy and radiation therapy, and additional chemotherapy after concurrent treatment. radiation therapy regimen is the same with radiation therapy group. Chemotherapy regimen: Topotecan (1.5mg /m2 d1,2, 1mg d3) and Cisplatin (25mg /m2 d1-3). Chemotherapy will be carry out in the 2nd and 6th week of radiation therapy. Additional chemotherapy regimen is the same with concurrent chemotherapy, and will be carry out in the 4th and 8th week after radiation therapy.