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Ovarian cancer is the eighth most common cancer and the sixth most common cause of cancer death affecting women in Australia.
There are three types of ovarian cancer: the common epithelial type (90% of cases) that arises from the cells on the outside of the ovary; the germ cell type that arises from the cells which produce eggs; and the rare stromal type arising from supporting tissues within the ovary.
Incidence and mortality
In 2011, 1330 new cases of ovarian cancer were diagnosed in Australian women. The risk of being diagnosed before age 85 is 1 in 81.
In 2012, there were 933 deaths caused by ovarian cancer in Australia.
There are no proven screening tests, although ultrasound through the vagina and a blood test, CA125, are being investigated.
Symptoms and diagnosis
There may be no symptoms or symptoms may be non-specific and include:
- abdominal bloating
- difficulty eating or feeling full quickly
- frequent or urgent urination
- back, abdominal or pelvic pain
- menstrual irregularities
- pain during sexual intercourse
Ovarian cancer often presents when it has spread. A common staging system is the FIGO (International Federation of Gynaecology and Obstetrics) system, which records the extent by whether it remains in the ovary, has spread to other pelvic structures or has spread into the lining of the abdomen with or without fluid (ascites). CT scans and blood test to measure CA125 are used.
The cause of ovarian cancer is not known, however risk factors include:
- ageing (risk increases for women over 50)
- family history
- changes in the genes BRCA1 or BRCA2.
- being of Northern European or Northern or Ashkenazi Jewish descent
- early onset of periods (before 12 years) and late menopause
- first child after 30
- never taking oral contraceptives
- using oestrogen only hormone replacement therapy or fertility treatment.
There is no proven method of prevention. Oophorectomy (removal of ovaries) in women with a strong family history does not always prevent cancer.
Treatment depends on the extent of the cancer. Surgery is used to determine the extent of disease and, if localised, is the main treatment. If the cancer has spread, an attempt is made to remove as much as possible.
Chemotherapy, commonly with regimens containing cisplatin or carboplatin and paclitaxel or docetaxel, is used after surgery to try to eliminate all disease identified by scan and CA125 blood test. Chemotherapy can be injected into the bloodstream through the vein or instilled into the abdominal cavity or both.
With widespread disease, chemotherapy may be used first. Surgery after chemotherapy can assess response. Germ cell tumours can be cured with chemotherapy with PEB (cisplatin, etoposide, bleomycin).
An individual's prognosis depends on the type and stage of cancer as well as their age and general health at the time of diagnosis. If the cancer is treated when it is still confined to the ovaries, 93% patients will be alive in five years. If the cancer has spread to surrounding tissue or organs in the pelvis, this drops to 39%, and if it has spread more distantly, 30%. Survival will vary between individuals and may depend on their response to treatment.
In Australia, the overall five year survival rate for women diagnosed with ovarian cancer is approximately 43%.
For more information, contact Cancer Council 13 11 20 (cost of a local call).
For more information
- Reduce your risk fact sheets
- Early detection of ovarian cancer
- After a diagnosis of ovarian cancer
- Australian Institute of Health and Welfare 2012. Cancer survival and prevalence in Australia: period estimates from 1982 to 2010. Cancer Series no. 69. Cat. no. CAN 65. Canberra: AIHW.
- Australian Institute of Health and Welfare 2015. ACIM (Australian Cancer Incidence and Mortality) Books. Canberra: AIHW.
- Australian Institute of Health and Welfare & Australasian Association of Cancer Registries 2012. Cancer in Australia: an overview, 2012. Cancer series no. 74. Cat. no. CAN 70. Canberra: AIHW.
This page was last updated on: Monday, May 4, 2015