Breast Cancer

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Breast Cancer: Cause

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Content provided by Healthwise

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Cause

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The exact cause of breast cancer is not known. Female hormones and increasing age play a part. The chances that you will develop breast cancer increase as you age. In the United States, about 1 in every 8 women who live to be 80 will have been diagnosed with breast cancer at some point in her life.²

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Many people believe that only women have breast cancer. But, although rare, about 1% of all breast cancer occurs in men. Most men who have breast cancer are older than 65, but it can appear in younger men. For this reason, any breast lump in an adult man is considered abnormal.⁷

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Kathe Gallagher, MSW

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Joy Melnikow, MD, MPH - Family Medicine, Douglas A. Stewart, MD - Medical Oncology

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