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Axillary lymph node biopsy showed metastatic adenocarcinoma (hematoxylin and eosin, magnification × 200) (A, E, I, M, Q). Immunohistochemical analysis revealed tumor cells were positive for ER (J, N, R), PgR (K, O), negative for ER (B, F), PgR (C, G, S), but negative for HER2 (D, H, L, P, T) (magnification × 200).
