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Stage 3

Read more about what stage 3 ovarian cancer is and the treatment options available.

Staging ovarian cancer

The stage of a cancer tells the doctor how far it has grown and if it has spread. The tests and scans you have to diagnose your cancer will give some information about the stage. This information will help your specialist tailor your treatment to the stage of your cancer.

Doctors use a simple 1 to 4 staging system for ovarian cancer. It is called the FIGO system after its authors - the International Federation of Gynaecological Oncologists.

Stage 3

Stage 3 ovarian cancer means the cancer has spread outside the pelvis into the abdominal cavity. Your cancer is also stage 3 if cancer is found in the lymph nodes in your upper abdomen, groin or behind the womb.

It is divided into three groups:

  • 3a - cancer growths are found in tissue samples taken from the lining of the abdomen
  • 3b - there are cancer growths that are 2cm or smaller in size on the lining of the abdomen
  • 3c - cancer growths larger than 2cm are found on the lining of the abdomen, OR cancer is found in lymph nodes in the upper abdomen, groin and/or behind the womb
Diagram showing stage 3 ovarian cancer


The stage of your cancer helps your doctor to decide which treatment you need. Treatment also depends on:

  • your type of cancer (the type of cells the cancer started in)
  • where the cancer is
  • other health conditions that you have

Treating stage 3 ovarian cancer

Stage 2, 3 and 4 ovarian cancers are classed as advanced. This means the cancer has spread away from the ovary. Some advanced cancers may be cured with surgery and chemotherapy. If your cancer can't be cured, the aim of treatment is to control the cancer for as long as possible.


You may have surgery as the first treatment for your cancer. The surgeon removes as much of the cancer as possible. This is called debulking. Whether you have surgery will depend on a number of factors, including:

  • where the cancer has spread to
  • your general health
  • how quickly the cancer is growing


After you have recovered from surgery, you will have chemotherapy.

If your surgeon could remove all your cancer, chemotherapy aims to reduce the risk of the cancer coming back. If the surgeon couldn't remove all the cancer, chemotherapy aims to shrink the cancer that has been left behind. Some women may then have further surgery.

From looking at the scans you had at diagnosis, your surgeon may decide that it would not be possible to remove all the cancer. In this case, you may have chemotherapy before surgery, to shrink the cancer and make it easier to remove. Chemotherapy before surgery is called neo adjuvant (pronounced nee-oh-ad-joo-vent) or primary chemotherapy.

Scans during chemotherapy

With primary chemotherapy, you have a scan halfway through the course. If the cancer is shrinking, you will then have surgery. You may hear your surgeon call this interval debulking surgery, or IDS. After the surgery, you have the rest of the course of chemotherapy.

Biological therapy

For some advanced cancers, you may have a type of biological therapy called bevacizumab with chemotherapy. Women with gene changes called BRCA1 or BRCA2 may have a drug called olaparib if chemotherapy is no longer controlling their cancer.

Last reviewed: 
30 Nov 2016
  • Cancer and its management (7th edition)
    Tobias J. and Hochhauser D.
    Wiley-Blackwell, 2015

  • Newly diagnosed and relapsed epithelial ovarian carcinoma: ESMO clinical practice guidelines for diagnosis, treatment and follow up
    Annals of oncology 2013. 24 (suppl 6): Vi24 - vi 32

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