Table 1.

Breast cancer subtypes and expression of biological markers.

Breast cancer subtypes		Immunohistochemical analysis
1	Luminal A	PR(+) and/or ER(+) and HER2(-),↓ Ki67
2	Luminal B	PR(+) and/or ER(+) and HER2(+/-),  ↑ Ki67
3	Basal Like	PR(-) and ER(-) and HER2(-)
4	HER2 enriched	PR(-) and ER(-) and HER2(+)