School-age drinking increases breast cancer risk

http://www.eurekalert.org/pub_releases/2013-08/wuso-sdi082813.php

Public release date: 28-Aug-2013
Contact: Jim Goodwin
Washington University School of Medicine

Here's a sobering fact for millions of young women heading back to school: The more alcohol they drink before motherhood, the greater their risk of future breast cancer.

That's according to new research from Washington University School of Medicine in St. Louis that, for the first time, links increased breast cancer risk to drinking between early adolescence and first full-term pregnancy. Previous studies have looked at breast cancer risk and alcohol consumption later in life or at the effect of adolescent drinking on noncancerous breast disease.

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If a female averages a drink per day between her first period and her first full-term pregnancy, she increases her risk of breast cancer by 13 percent,” said co-author Graham Colditz, MD, DrPH, associate director for cancer prevention and control at Siteman Cancer Center at Barnes-Jewish Hospital and Washington University School of Medicine.

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The researchers also found that for every bottle of beer, glass of wine or shot of liquor consumed daily, a young woman increases her risk of proliferative benign breast disease by 15 percent. Although such lesions are noncancerous, their presence increases breast cancer risk by as much as 500 percent, Liu said.

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