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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.