For decades, black women faced lower risk of being diagnosed with breast cancer than did white women. ColorBlind Images/Blend Image/Corbis hide caption

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A woman's health history and tolerance for different kinds of risks should have a legitimate role in determining the timing of when she starts and stops getting screening mammograms, some leading doctors say. Sally Elford/Ikon Images/Getty Images hide caption

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The American Cancer Society has pushed back the age at which most women should begin having mammograms to 45. iStockphoto hide caption

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Although false alarms are not at all unusual when it comes to mammograms, they can cause women much anxiety. Doctors are thinking about ways to ease those fears. iStockphoto hide caption

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Ductal carcinoma in situ sometimes can turn into invasive breast cancer, but there's currently no test that can tell when it's dangerous and when it's not. Steve Gschmeissner/Science Photo Library/Corbis hide caption

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Lateral mammogram showing a tumor iStockphoto hide caption

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The group of women in a new study with the lowest rate of breast cancer consumed about four tablespoons of olive oil each day. Heather Rousseau/NPR hide caption

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Actress Rita Wilson arrives at the premiere of the documentary Fed Up in West Hollywood, Calif., in May 2014. Gus Ruelas/Reuters/Landov hide caption

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The U.S. Preventive Services Task Force recommends mammograms every other year, while the American Cancer Society endorses annual scans. Kari Lehr/Image Zoo/Corbis hide caption

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Catharine Becker of Fullerton, Calif., was diagnosed with stage 3 breast cancer at 43 despite having a clean mammogram. The mother of three didn't know she had dense breast tissue until after she was diagnosed. Heidi de Marco/Kaiser Health News hide caption

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Some researchers recommend starting mammogram screening at age 40, while others say age 50. Some doctors think screening should be based on a woman's overall risk for breast cancer, not just her age. Hero Images/Corbis hide caption

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