Figure 3
From: Signet-ring cell carcinoma of the breast: a case report
Immunohistochemical findings of the tumor. The signet-ring cell carcinoma (SRCC) component was negative for (A) ER, (B) PR, (C) GCDFP-15, (D) mammaglobin, (E) Hep Par1, (F) TTF-1, (G) MUC2 and (H) CK20; magnification × 200. CK20, cytokeratin 20; ER, estrogen receptor; GCDFP-15, gross cystic disease fluid protein-15; Hep Par1, hepatocyte paraffin 1; MUC2, mucin 2 glycoprotein; PR, progesterone receptor; SRCC, signet-ring cell carcinoma; TTF-1, thyroid transcription factor-1.