Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The classification of breast cancer sub-types based on the expression of biomarkers in tumors. ER: estrogen receptor; HER2: human epidermal receptor 2; Ki-67: a protein marker for proliferation; PR: progesterone receptor.
| Breast Cancer Type | ER | HER2 | Ki-67 | PR |
|---|---|---|---|---|
| Luminal A | Positive | Negative | Low level | High level |
| Luminal B | Positive | Negative | High level | Low level |
| HER2-positive | Negative | Over-expressed | Unclear | Negative |
| Triple negative | Negative | Negative | Unclear | Negative |
