From: Dual color chromogenic in situ hybridization for determination of HER2 status in breast cancer: a large comparative study to current state of the art fluorescence in situ hybridization
Consecutive and IHC 2+ specimens
Consecutive specimens only
HercepTest™
Frequency
Percent
0
102
27.9
33.5
1+
113
31.0
37.2
2+
118
32.3
57
18.8
3+
32
8.8
10.5
Total
365
100
304