Fig. 2. Representative images of IHC of ER, PR, HER2 and Ki-67 in human breast cancer tissue (20×).
Arrows showing abundantly stained areas for different receptors in breast cancer tissues. Breast cancer tissue was stained with antibodies specific for ER, PR, HER2 and Ki-67. Images depict ER-positive (A), PR-positive (B), HER2-positive (C) and Ki-67-positive (D). IHC, immunohistochemistry; ER, estrogen receptor; PR, progesterone receptor; HER2, human epidermal growth factor receptor 2.