Luminal A Luminal B HER-2 Basal-like Hormonal receptors status ER+ PR+/- ER+ PR+/- ER+/- PR+/- ER- PR- HER-2 negative negative /positive positive negative Ki-67 <14% >14% >14% >14% cytokeratins 8/18 + 8/18 +   5/6/8/14/18+

Table 2: Immunohistochemistry correlation with molecular classification of breast cancer tumors.