Table 1 Immunohistochemistry/FISH and immunohistochemistry/CISH concordance

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

Group Immunohistochemistry result FISH concordance (%) CISH concordance (%)
1 0/1+ (n=69) 69/69 (100) 67/69 (97)
2 3+ (n=50) 46/50 (92) 47/50 (94)
3 2+ (n=135) 37/135 (positive) 37/135 (positive)
   89/135 (negative) 89/135 (negative)