Cancer has spread to the lower third of the vagina, and/or onto the pelvic wall, and/or has caused kidney problems. Stage III is divided into stages IIIA and IIIB, based on how far the cancer has spread. In stage IIIA, cancer has spread to the lower third of the vagina but not onto the pelvic wall. In stage IIIB, (1) cancer has spread onto the pelvic wall; or (2) the tumor has become large enough to block one or both ureters (tubes that connect the kidneys to the bladder) and has caused one or both kidneys to get bigger or stop working.