Stage IIIB ovarian cancer; drawing shows tumors inside both ovaries that have spread to the uterus, colon, small intestine, and the peritoneum, where they are 2 centimeters or smaller in diameter. An inset shows 2 centimeters is about the size of a peanut. Also shown are the fallopian tubes and bladder.
Stage IIIB ovarian cancer. In stage IIIB, cancer is found in one or both ovaries and has spread to other tissue within the abdomen and to the peritoneum, where it is 2 centimeters or smaller in diameter. Cancer that has spread to the surface of the liver is also considered to be stage III.