Table 3.
Evaluation of HER2 status in patients with invasive breast cancer
| HER2 status | Patients, n (%) |
|---|---|
| Negativea | 3,697 (81.5) |
| Positiveb | 785 (17.3) |
| Not determined | 52 (1.1) |
| No information | 11 |
| Intermediate positive (IHC 2+), no information for FISH/CISH | 26 |
| Intermediate positive (IHC 2+), no FISH/CISH performed | 80 |
IHC = Immunohistochemistry; FISH = fluorescence in situ hybridisation; CISH = chromogenie in situ hybridisation.
a
IHC 0 or 1+, or 2+ and FISH negative.
b
IHC 3+, or 2+ and FISH positive.