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Study uncovers value of mammogram screening for younger women
Date:9/8/2013

A new analysis has found that most deaths from breast cancer occur in younger women who do not receive regular mammograms. Published early online in CANCER, a peer-reviewed journal of the American Cancer Society, the study indicates that regular screening before age 50 should be encouraged.

The use of mammograms to prevent breast cancer deaths has been controversial, especially after the United States Preventive Services Task Force proposed in 2009 to limit screening to women aged 50 to 74 years. Studies show varying benefits, and advances in treatment may have diminished the importance of early detection. Blake Cady, MD, Professor of Surgery (emeritus) of Harvard Medical School in Boston, and his colleagues set out to provide more definitive information on the value of mammography screening through a technique called "failure analysis." Such analyses look backward from death to discover correlations at diagnosis, rather than looking forward from the start of a study. Only one other failure analysis related to cancer has been published to date. In this analysis, invasive breast cancers diagnosed at Partners HealthCare hospitals in Boston between 1990 and 1999 were followed through 2007. Data for the study included demographics, mammography use, surgical and pathology reports, and recurrence and death dates.

Among 609 confirmed breast cancer deaths, 29 percent were among women who had been screened with mammography, while 71 percent were among unscreened women. Of all breast cancer deaths, only 13 percent occurred in women aged 70 or older, but 50 percent occurred in women under age 50. Among women diagnosed with breast cancer, those who died of the disease were a median of 49 years old at diagnosis; for those dying of any other cause, the median age at diagnosis was 72 years.

"The biological nature of breast cancer in young women is more aggressive, while breast cancer in older women tends to be more indolent. This suggests
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Contact: Amy Molnar
sciencenewsroom@wiley.com
Wiley
Source:Eurekalert

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