Fig. 2

Examples of concordant immunohistochemical brown stainings of breast primary tumor and corresponding metastases. These samples were from the same patient, all the primary tumor cores (a, b, c, d and e) were ER-stained and scored 3+, corresponding metastatic sites (f, g, h, i and j) were all scored as 3+ ER expression as well. This case shows concordant 3+ ER expression among different tissue cores from the same primary lesion and every individual metastatic site