Ductal carcinoma in situ (DCIS) is defined as a non-invasive overgrowth of cells characterized by high proliferation within the breast ductal system. Studies suggest that triple-negative DCIS (TN-DCIS), a rare type of DCIS, is a precursor stage of invasive breast cancer5,6.
What percentage of DCIS is triple negative?
Triple-negative breast cancers are defined as tumors that lack ER, PR, and HER2 expression. These tumors account for 10% to 15% of all breast carcinomas, depending on the thresholds used to define ER and PR positivity and the methods used for HER2 assessment.
What is the survival rate of triple negative breast cancer?
Survival rates for triple-negative breast cancer
The five-year survival rate for someone with localized triple-negative breast cancer, cancer that has not spread beyond the breast, is 91 percent (91 percent as likely as someone without cancer to survive during the five-year period).
