What is ovarian cancer?
Ovarian cancer starts in a woman's ovaries. There
are two ovaries, one on each side of the pelvis. The ovaries
produce eggs and are the main source of the female hormones,
estrogen and progesterone.
A woman's menstrual cycle is usually about 28 days.
Every month, at around the middle of the menstrual cycle,
an egg is released from one ovary in a process called ovulation.
The egg travels from the ovary through the fallopian tube
to the uterus. A malignant (or cancerous) tumor that begins
in the ovaries is called ovarian cancer.
Ovarian cancer is most common in women over the age of
50, it can affect women of any age. As women get older,
their chance of developing ovarian cancer increases. Women
who have ovarian cancer often overlook symptoms because they
are mild and not very noticeable.
The American Cancer Society estimates that about 20,180
new cases of ovarian cancer will be diagnosed in the United
States during 2006. Ovarian cancer accounts for about
3% of all cancers in women.
Ovarian cancer ranks fifth in cancer deaths among women,
accounting for more deaths than any other cancer of the female
reproductive system. It is estimated that there will be
about 15,310 deaths from ovarian cancer in the United States
during 2006.
The ovarian cancer incidence rate has decreased by about
0.7% per year since 1985. About 76% of women with ovarian
cancer survive 1 year after diagnosis, and 45% survive longer
than 5 years after diagnosis. Women younger than age 65 have
better 5-year survival rates than older women.
Risk factors for ovarian cancer include
- Age: Most ovarian cancers develop after menopause.
- Obesity: A study from the ACS found a higher rate
of death from ovarian cancer in obese women.
- Reproductive history: There seems to be a relationship
between the number of menstrual cycles in a woman's lifetime
and her risk of developing ovarian cancer.
- Fertility drugs and infertility also increases
the risk of ovarian cancer, even without use of fertility
drugs. More research to clarify these relationships is now
underway.
- Family history of ovarian cancer, breast cancer,
or colorectal cancer.
- Personal history of breast cancer: If you have
had breast cancer, you also have an increased risk of developing
ovarian cancer.
- Talcum powder: It has been suggested that talcum
powder applied directly to the genital area or on sanitary
napkins may be carcinogenic (cancer-causing) to the ovaries.
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