Cancer has spread beyond the uterus and cervix, but has not spread beyond the pelvis. Stage III is divided into stage IIIA, IIIB, and IIIC, based on how far the cancer has spread within the pelvis. In stage IIIA, cancer has spread to (1) the outermost layer of the uterus; and/or (2) tissue just beyond the uterus; and/or (3) the peritoneum (tissue that lines the abdominal wall and organs). In stage IIIB, cancer has spread beyond the uterus and cervix, into the vagina. In stage IIIC, cancer has spread to lymph nodes near the uterus.