Table 2 Concordance/discordance between FISH and CISH

From: Chromogenic in-situ hybridization: a viable alternative to fluorescence in-situ hybridization in the HER2 testing algorithm

Group Immunohistochemistry result    FISH/CISH discordance
   FISH/CISH concordance FISH CISH
   Number % Number Positive Negative Positive Negative
1 0/1+ (n=69) 67/69 97 2/69 2 2
2 3+ (n=50) 49/50 98 1/50 1 1
3 2+ (n=135) 126/135 93 9/135 6 3 1 8
  Total 242/254 95.3 12 6 6 4 8