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Clinicopathological classification of breast cancer subtypes.
| Subtype | HR Status | HER2 Status | Ki-67 Expression |
|---|---|---|---|
| Luminal A | Positive | Negative | Low |
| Luminal B | Positive | Negative | High |
| Luminal B | Positive | Positive | - |
| HER2+ | Negative | Positive | - |
| Triple-negative | Negative | Negative | - |
HR = hormone receptor include both estrogen receptor (ER) and progesterone receptor (PR), HER2 = human epidermal growth factor 2, Ki-67 = proliferative index.
