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Figure 1 :Immunohistochemical staining patterns for ErbB-2, estrogen receptor (ER) and progesterone receptor (PR) in formalinfixed paraffi n-embedded invasive breast tumor tissue using ErbB-2, ER and PR antibodies from 55 primary breast tumors. (AD) ErbB-2, (E) ER, (F) PR. (A) An example of invasive ductal carcinoma showing negative staining (Score 0, negative) (B) An example of invasive ductal carcinoma showing weak staining (Score 1, negative) (C) An example of an invasive ductal carcinoma showing moderate membrane staining (Score 2, positive) (D) An example of an invasive ductal carcinoma showing strong membrane staining (Score 3, positive) (E) An example of an invasive ductal carcinoma showing ER-positive nuclear staining (F) An example of an invasive ductal carcinoma showing PR-positive nuclear staining

Figure 1 :Immunohistochemical staining patterns for ErbB-2, estrogen receptor (ER) and progesterone receptor (PR) in formalinfixed paraffi n-embedded invasive breast tumor tissue using ErbB-2, ER and PR antibodies from 55 primary breast tumors. (AD) ErbB-2, (E) ER, (F) PR. (A) An example of invasive ductal carcinoma showing negative staining (Score 0, negative) (B) An example of invasive ductal carcinoma showing weak staining (Score 1, negative) (C) An example of an invasive ductal carcinoma showing moderate membrane staining (Score 2, positive) (D) An example of an invasive ductal carcinoma showing strong membrane staining (Score 3, positive) (E) An example of an invasive ductal carcinoma showing
ER-positive nuclear staining (F) An example of an invasive ductal carcinoma showing PR-positive nuclear staining