The tumor is found in one or both ovaries and has spread to other parts of the abdomen. Stage III ovarian germ cell tumor is divided into stages IIIA, IIIB, and IIIC. In stage IIIA, the tumor is found in the pelvis only, but cancer cells have spread to the surface of the peritoneum (the tissue that lines the abdominal wall and covers most of the organs in the abdomen). In stage IIIB, cancer has spread to the peritoneum but is 2 centimeters or smaller in diameter. In stage IIIC, cancer has spread to the peritoneum and is larger than 2 centimeters in diameter and/or has spread to lymph nodes in the abdomen. Cancer that has spread to the surface of the liver is considered stage III disease.