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Estrogen induces regions of invasive breast carcinoma with increased ER and PR and decreased Muc2 expression. Immunohistochemistry was performed using antibodies directed IHC against ER, PR, or Muc2 (DAB, brown) CK8/18, CK18 (AP, Permanent red). Stains of MBCPure tumor and MBCMixed tumor with mucinous (MUC) and invasive breast carcinoma (IBC) regions are shown
