More than a million women have been treated for cancers that never would have threatened their lives, researchers of a new study estimate. Up to one-third of breast cancers, or 50,000 to 70,000 cases a year, don't need treatment, the study suggests. It's the most detailed look yet at overtreatment of breast cancer, and it adds fresh evidence that screening is not as helpful as many women believe. Mammograms are still worthwhile, because they do catch some deadly cancers and save lives, doctors stress. And some of them disagree with conclusions the new study reached. Read more here.
Study mentioned: Bleyer A, Welch HG. Effect of Three Decades of Screening Mammography on Breast-Cancer Incidence. N Engl J Med 2012; 367:1998-2005.
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