Frequency of immunostaining among arrayed breast carcinoma cases
| Antigen | Interpretable cores | Positive staining (%) | Negative staining (%) |
|---|---|---|---|
| ER | 755 | 302 (40) | 453 (60) |
| HER2 | 744 | 150 (20) | 594 (80) |
| CK5/6 | 788 | 110 (14) | 678 (86) |
| CK17 | 765 | 35 (5) | 730 (95) |
| HER1 | 614 | 82 (13) | 532 (87) |
| c-KIT | 761 | 105 (14) | 656 (86) |