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Table 2 Breast tumor samples and their corresponding immunohistochemistry (IHC), chromogenic in situ hybridization (CISH) results, and tumor histologic grade

From: Chromogenic in situ hybridization (CISH): a novel alternative in screening archival breast cancer tissue samples for HER-2/neu status

IHC score No. of tests CISH amplification Histologic grade
   Negative Low High 1 2 3
0 40 40 0 0 1 33 6
1+ 40 40 0 0 3 28 9
2+ 40 22 8 10 0 24 16
3+ 40 0 9 31 0 27 13
Total 160 102 17 41 4 112 44