Breast Cancer Facts

What Is Breast Cancer?

Breast cancer cells are breast cells that become abnormal over time by dividing uncontrollably. The majority of breast cancers begin in the ducts (85%). 10% percent begin in the lobules of breast tissue. It takes about 5-10 years for breast cancer cells to grow into large enough to form a tumor or mass you can feel.

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In 2017, an estimated 231, 840 new cases of invasive breast cancer will be diagnosed among women, as well as an estimated 63,410 additional cases of in situ breast cancer.

In 2017, approximately 40,610 women are expected to die from breast cancer. Only lung cancer accounts for more cancer deaths in women.

In 2017, about 2,470 cases of breast cancer are expected to occur among men, accounting for about 1% of all breast cancers. A man’s lifetime risk of breast cancer is 1 in 1,000.

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