Hormone Therapy May Up Ovarian Cancer
Risk Seen in Women Using Hormone Therapy for at Least 10 Years
Oct. 4, 2006 -- Women who use menopausal hormone replacement therapy for a
decade or longer may be more likely to get ovarian cancer.
That news appears in a study published in the Journal of the National
The researchers included James Lacey Jr., PhD, of the National Cancer
Lacey and colleagues studied more than 97,600 women who were 50-71 years old
when the study started in the mid-1990s.
The women completed surveys in 1995-1996 and 1996-1997 about their health
and menopausal hormone replacement therapy use, including estrogen and
At the time, none had had ovarian cancer.
By the end of 2000, 214 women had been diagnosed with ovarian cancer.
Those who had used hormone replacement therapy for 10 years or longer were
more likely to be diagnosed with ovarian cancer during the study.
Women who had used hormone replacement therapy for less than a decade
weren't more likely to be diagnosed with ovarian cancer.
Past studies on hormone replacement therapy and ovarian cancer risk have had
mixed results, the researchers note.
"The increased absolute risks appear to be small, and other risk-benefit
considerations may dominate patients' and clinicians' decision-making regarding
hormone therapy," Lacey's team writes.
In other words, hormone replacement therapy may not dramatically raise the
risk of ovarian cancer, and women and their doctors should weigh hormone
therapy's pros and cons.
"Nonetheless, these associations, if real, represent potentially
avoidable risk factors for a highly fatal cancer and therefore warrant
continued investigation," the researchers add.
That is, if the findings hold up, they may suggest one way to lower ovarian
About Ovarian Cancer
Ovarian cancer is the ninth most
common cancer and the No. 5 cause of cancer death for U.S. women, according to
the American Cancer Society.
Ovarian cancer is the deadliest cancer of women's reproductive system,
partly because there are no proven screening tests to spot ovarian cancer in
its early, more treatable stages.
Ovarian Cancer Symptoms
Early ovarian cancer often doesn't show any obvious symptoms.
According to the NCI, these symptoms may appear as ovarian cancer grows:
- Pressure or pain in the abdomen, pelvis, back, or legs
- A swollen or bloated abdomen
- Nausea, indigestion, gas, constipation, or diarrhea
- Feeling very tired all the time
Less common symptoms may include:
- Shortness of breath
- Feeling the need to urinate often
- Unusual vaginal bleeding (heavy periods, or bleeding after menopause)
Such symptoms don't necessarily mean a woman has ovarian cancer, "but
only a doctor can tell for sure," states the NCI's web site.
"Any woman with these symptoms should tell her doctor," states the