RADIATION THERAPY (weeks 8-13 or 8-15): Patients with stage I disease undergo high dose rate (HDR) brachytherapy once weekly for a total of 5 fractions during weeks 8-13. All other patients undergo external beam radiation therapy (EBRT) once daily (QD) 5 days a week for a total of 25 fractions during weeks 8-12 and HDR brachytherapy once weekly for a total of 3 fractions during weeks 13-15.