Chemotherapy and Pelvic Radiation Therapy With or Without Additional Chemotherapy in Treating Patients With High-Risk Early-Stage Cervical Cancer After Radical Hysterectomy

DISEASE CHARACTERISTICS: * Histologically confirmed squamous, adenosquamous, or adenocarcinoma of the cervix with any/all of the following high-risk features after surgery: * Positive pelvic nodes * Positive parametrium * Positive para-aortic nodes that have been completely resected and are positron emission tomography (PET)/computed tomography (CT) scan-negative * PET only required if positive para-aortic nodes during surgery * Clinical stage IA2, IB, or IIA disease (this corresponds to surgical tumor node metastasis (TNM) staging of T1-T2, N1, M0) * Must have undergone radical hysterectomy (open, laparoscopically, or robotic) and staging within the past 70 days * Para-aortic and pelvic node sampling required * If the patient did not have a para-aortic lymph node sampling/dissection, but had common iliac node dissection that was negative, a PET-CT is recommended, but not required * A negative pre- or post-operative PET scan or PET-CT scan of the para-aortic nodes is required if the patient did not undergo para-aortic or common iliac nodal sampling/dissection * No gross residual disease * No neuroendocrine histology * No distant metastases PATIENT CHARACTERISTICS: * Zubrod performance status 0-1 * Absolute neutrophil count (ANC) ≥ 1,800/mm³ * Platelets ≥ 100,000/mm³ * White blood cell count (WBC) ≥ 4,000/mm³ * Hemoglobin ≥ 10.0 g/dL (transfusion or other intervention allowed) * Serum creatinine ≤ 1.5 mg/dL * Bilirubin ≤ 1.5 times upper limit of no…