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Table 4 Correlation between FISH and own CISH in IHC 2+ samples

From: Chromogenic in situ hybridisation for the assessment of HER2 status in breast cancer: an international validation ring study

  Own CISH (number of signals)  
FISH <5 5 6 >6 n
<2.0 44 0 3 0 47
2.0–4.0 11 1 2 4 18
>4.0 0 0 0 7 7
Total 56 1 5 11 73
  1. CISH, chromogenic in situ hybridisation; FISH, fluorescence in situ hybridisation; IHC, immunohistochemistry.