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Drinking linked to uterine cancer

Drinking two or more alcoholic beverages a day may raise the risk of uterine or endometrial cancer in older women.

health-and-fitness Updated: Sep 21, 2007, 14:45 IST

Older women who drink two or more alcoholic beverages a day may have an elevated risk of endometrial cancer, a new study suggests. Endometrial cancer begins in the lining of the uterus, and certain factors that raise a woman's lifetime exposure to estrogen are thought to contribute to the disease.

Obesity, late menopause and early menarche (the beginning of menstruation) have been linked to a heightened risk of endometrial cancer. Alcohol has been shown to raise post-menopausal women's estrogen levels - a fact that may explain the new findings, according to the study authors.

While the link between alcohol and endometrial cancer needs to be confirmed in other studies, the current results underscore the potential risks of too much alcohol, according to Dr Veronica Wendy Setiawan, an assistant professor of preventive medicine at the University of Southern California in Los Angeles.

"Moderation is the key," she told Reuters Health. Setiawan and her colleagues report the findings in the International Journal of Cancer. The findings are based on data from 41,574 post-menopausal women who reported their drinking habits and other lifestyle and health factors when they entered the study.

Over the next eight years, 324 women developed endometrial cancer.

Overall, the researchers found, women who averaged two or more alcoholic drinks a day were twice as likely to develop the cancer as non-drinkers were. No such risk was seen among lighter drinkers.

The findings don't prove a direct cause-and-effect relationship.

But, the researchers note, they are in line with studies showing that alcohol spurs an increase in blood estrogen levels in postmenopausal women. Because the current study did not include premenopausal women, it's not possible to speculate about the possible effects of alcohol on younger women's long-term risk of endometrial cancer, according to Setiawan.

However, she noted, there is evidence that younger women who drink relatively heavily - about two drinks or more a day - have higher estrogen levels than non-drinkers do.

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