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Representative images for ER immunostaining for (a) fibrocystic lesion, (c) fibroadenoma, (e) intraductal papilloma, (g) infiltrative ductal carcinoma, (i) infiltrative lobular carcinoma and HER2/neu immunohistochemistry staining for (b) fibrocystic lesion, (d) fibroadenoma, (f) intraductal papilloma, (h) infiltrative ductal carcinoma, (j) infiltrative lobular carcinoma (Scale bar 0.2 mm).
