| ER | Estrogen receptor |
| HER2 | Human epidermal growth factor receptor 2 |
| TNBC | Triple-negative breast cancer |
| TCGA | The Cancer Genome Atlas |
| METABRIC | Molecular Taxonomy of Breast Cancer International Consortium |
| DFS | Disease-free survival |
| DSS | Disease-specific survival |
| PFS | Progression-free survival |
| AJCC | American Joint Committee on Cancer |