• Breast Cancer Types Although breast cancer generally has been referred to as a single disease, there are up to 21 distinct histological subtypes and at least four different molecular subtypes that differ in terms of risk factors, presentation, response to treatment, and outcomes.

  • Race/Ethnicity During 2005–2014, overall breast cancer incidence rates increased among Asian + Pacific Islander women (1.7% per year), Non-Hispanic black women (0.4% per year), and Hispanic women (0.3% per year); however, they were stable among Non-Hispanic white and Native American/Alaskan native women.

  • Age Incidence rates are relatively stable in the over-50 age group and did not grow or decrease significantly during 2005–2014. In contrast, incidence rates have slowly increased (0.2% per year) since the mid-1990s among women under age 50.

  • Tumor size Incidence rates during 2005–2014 were stable for smaller (≤2.0 cm) tumors and increased by 1.3% annually for 2.1–5.0 cm tumors and by 1.9% annually for tumors larger than 5.0 cm.

  • Survival Rates Survival among cancer patients is compared with survival among people of the same age and race who have not been diagnosed with cancer. Based on the most recent data, relative survival rates for women diagnosed with breast cancer are:

    • 91% at 5 years after diagnosis
    • 86% after 10 years
    • 80% after 15 years

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