1. Triple-negative breast cancer means breast cancer that is estrogen receptor-negative, progesterone receptor-negative, and HER2-negative.
  2. Approximately 15 to 20 percent of breast cancers are triple-negative.
  3. Triple-negative breast cancer is more common in women who are younger, African-American, Hispanic/Latina or have a BRCA1 gene mutation.
  4. Triple-negative breast cancer grows and spreads more quickly than most other types of breast cancer.
  5. Mammograms can find breast tumors at an early stage, when treatment is most successful.
  6. The cancer stage is determined by the size of the tumor and whether the cancer cells have spread to areas outside the breast, such as the lymph nodes.
  7. Symptoms of triple-negative breast cancer are the same symptoms as for other types of breast cancer.
  8. Getting a diagnosis of triple-negative breast cancer includes a biopsy and laboratory tests for estrogen receptors, progesterone receptors, and HER2 in the cancer cells.
  9. Treatment for triple-negative breast cancer usually includes surgery to remove tumors and chemotherapy to shrink or kill cancer cells.
  10. New treatments that target triple-negative breast cancer cells are being studied in clinical trials.