( DES daughters the girls born to moth...)"DES Daughters" Have High Risk Of Breast Cancer,Health

"DES daughters", the girls born to mothers who took the anti-miscarriage drug diethylstilbestrol at the time of pregnancy have an increased risk of breast cancer//, according to a new study published in the August issue of the journal Cancer Epidemiology, Biomarkers & Prevention. Researchers found that DES daughters over age 40 had 1.9 times the risk of breast cancer than women who were not exposed to the drug.

They also found that the relative risk of developing the cancer was even greater in DES daughters over age 50, but say the number of older women in their study group is, as yet, too small for a firm statistical comparison.

"This is really unwelcome news because so many women worldwide were prenatally exposed to DES, and these women are just now approaching the age at which breast cancer becomes more common," said the study's lead author, Julie Palmer, Sc.D., professor of epidemiology at the Boston University School of Public Health.

She said an estimated one to two million women in the U.S. were exposed to DES, which was frequently prescribed to women from the 1940s through 1960s to prevent miscarriages.

The ongoing study suggests that DES-exposed women are developing the typical range of breast cancers after age 40 at a faster rate than non-exposed women of the same ages. The researchers also found that the highest relative risk of developing breast cancer was observed in study participants from the cohorts with the highest cumulative doses of DES exposure.

Because of the increased risk observed for DES daughters, the authors urge women who know they were exposed to DES to have regular screening mammograms, and to think twice about using supplemental female hormones.

"DES daughters often ask us about use of these hormones," Palmer said. "It might be wise for exposed women to avoid such supplements. Use of hormone supplements is, in itself, an independent breast cancer risk factor, and wo
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