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Comparison of HER2 and Topo2a status in 117/116 cases of primary BC and mLN by FISH and CISH. PT, primary tumor; mLN, metastatic lymph node; FISH, fluorescence in situ hybridization; CISH, chromogenic in situ hybridization; HER2, ErbB2 status; Topo2a, topoisomerase 2a status; a, amplification; n.a, no amplification;}, discordant cases; κ, Cohen's kappa.
