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Table 2 Inter-laboratory correlation between 'own CISH' and 'outside CISH'

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

  Outside CISH (number of signals)  
Own CISH (number of signals) <5 5 6 >6 No signal n
<5 94 2 1 3 1 101
5 0 1 0 2 1 4
6 3 3 0 3 0 9
>6 4 3 7 78 0 92
No signal 0 0 0 1 1 2
Total 101 9 6 87 3 208
  1. CISH, chromogenic in situ hybridisation.