Ovarian Cancer: Stages

Ovarian Cancer

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Ovarian Cancer Stages

Staging is a standard way of categorizing cancers that is used to determine prognosis and treatment. The staging for ovarian cancer is as follows:

  • Stage I: Cancer is confined to one or both ovaries
    • Stage IA: Growth is limited to 1 ovary with no tumor on external surfaces
    • Stage IB: Growth is limited to both ovaries with no tumor on external surfaces
    • Stage IC: Tumor is either stage IA or IB, but with tumor on surface of one or both ovaries
  • Stage II: Cancer has spread to the uterus or other nearby organs
    • Stage IIA: Extension and/or metastases of cancer to the uterus and/or fallopian tubes
    • Stage IIB: Extension of the cancer to other pelvic tissues
    • Stage IIC: Tumor is at either stage IIA or IIB, but with tumor on surface of one or both ovaries
  • Stage III: Cancer has spread to the lymph nodes or abdominal lining
    • Stage IIIA: Tumor limited to the true pelvis
    • Stage IIIB: Metastasis of abdominal peritoneal surfaces ≤ 2 cm. in diameter
    • Stage IIIC: Peritoneal metastasis beyond the pelvis > 2 cm. in diameter
  • Stage IV: Cancer has spread to distant organs, such as the lungs or liver

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Photo courtesy of the Ovarian Cancer Alliance of Ohio