Study reignites controversy over mammograms

CHICAGO (Reuters) – As many as a third of cancers detected through routine mammograms may not be life threatening, according to a study published on Wednesday that raises fresh questions about the benefits of breast cancer screening. The study, which looked at three decades of U.S. government data, found more than 1 million women may have been over diagnosed for breast cancer, needlessly exposing them to the anguish of a breast cancer diagnosis and the ordeal of treatment. “It’s a lot of women. It’s a very substantial harm,” said Dr. …