From: ER and HER2 expression are positively correlated in HER2 non-overexpressing breast cancer
HER2 | FISH | |||||
---|---|---|---|---|---|---|
 |  | Positive | Negative | Equivocal | Not available | Total |
IHC | Positive (3+) | 29 | 5 | 2 | 1 | 37 |
 | Equivocal (2+) | 2 | 13 | - | 4 | 19 |
 | Negative (1+) | 2 | 91 | 1 | 7 | 101 |
 | Negative (0) | 1 | 86 | - | 9 | 96 |
 | Not available | - | 4 | - | - | 4 |
 | Total | 34 | 199 | 3 | 21 | 257 |