Patients in this study are already scheduled to begin radiation therapy. Researchers will get tumor cells by taking two biopsies of the cervix. The first biopsy of the cervical tumor will be done before any treatment is given. The second biopsy will be performed about 48 hours after the radiation treatment has begun. They will then study the cells in the lab with a new technique for studying gene expression called DNA array, as well as human papillomavirus (HPV) analysis, quantification of apoptosis levels, hematoxylin and eosin staining, and storage of tissue for future research.