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Table 1 Concordance between IHC versus FISH

From: Her2 assessment using quantitative reverse transcriptase polymerase chain reaction reliably identifies Her2 overexpression without amplification in breast cancer cases

IHC testing

FISH testing, N (%)

FISH positive

FISH negative

0

0 (0)

44 (100)

1+

0 (0)

13 (100)

2+

6 (12.2)

43 (87.8)

3+

45 (95.7)

2 (4.3)

  1. IHC immunohistochemistry, FISH fluorescence in situ hybridization