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Women's Health

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Breast Cancer Deaths in Younger, Unscreened Women

Mammograms should begin at age 40, researcher says

WebMD News from HealthDay

By Kathleen Doheny

HealthDay Reporter

MONDAY, Sept. 9 (HealthDay News) -- New breast cancer research reveals a significant death rate among women under 50 who forgo regular mammograms and casts doubt on recent screening guidelines from a U.S. panel of experts.

The findings support the merit of regular mammograms, especially for younger women, said study researcher Dr. Blake Cady, professor emeritus of surgery at Harvard Medical School and Massachusetts General Hospital in Boston.

"I would propose that women start screening at age 40," Cady said. Younger women tend to have faster-growing, more aggressive tumors, experts say.

When mammograms should start and how often they should be repeated has been a controversial subject. In 2009, the U.S. Preventive Services Task Force, a panel of experts that makes recommendations about health practices, said women aged 50 to 74 should get screening mammograms every two years. Women under 50, the panel said, should talk to their doctors and decide whether to be screened based on potential benefits, such as early detection, and harms, including over-treatment and anxiety caused by false-positive results.

The American Cancer Society and other organizations, however, have continued to recommend annual screening beginning at age 40 for women at average risk. More than 40,000 women die of breast cancer in the United States each year.

For the new study, published online Sept. 9 in the journal Cancer, researchers evaluated more than 600 breast cancer deaths, looking back at mammography records and other details.

Seventy-one percent of the deaths occurred among unscreened women, most of them younger, Cady found. Half of all the breast cancer deaths occurred in women under age 50, while only 13 percent of the women who died of breast cancer were 70 and older.

For the study, Cady and his colleagues tracked invasive breast cancer cases from their diagnoses, between 1990 and 1999, until 2007. Patients were treated at Partners HealthCare hospitals in Boston. The researchers had access to mammography use, surgery and pathology reports, and dates of death.

Cady's team used a technique called "failure analysis," in which scientists look back to see what might have gone wrong. "It's the converse of a randomized trial, which starts at point A and follows people until the end of the study," Cady said. "We follow people who have died and go backward to their original diagnosis and find out the details."

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