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Results of HER2 Immunohistochemistry and FISH
| Assay | Patients (n [%]) |
| HER2 CB11 score | |
| Negative | 130 (80%) |
| Positive | 32 (20%) |
| Total | 162 (100%) |
| HER2 HercepTest score | |
| 0 | 63 (40%) |
| 1 | 45 (28%) |
| 2 | 17 (11%) |
| 3 | 33 (21%) |
| Total | 158 (100%) |
| HER2 FISH | |
| HER2/CEP17 ratio <2.0 | 113 (74%) |
| HER2/CEP17 ratio ≥2.0 | 39 (26%) |
| Total | 152 (100%) |
FISH, fluorescent in situ hybridization.
