Table 4 HER2 expression evolution from HER2-negative primary breast cancer to HER2-negative recurrent breast cancer according to breast cancer phenotype.
From: Evolution of HER2-low expression from primary to recurrent breast cancer
HER2 expression on recurrence/metastasis | |||||
|---|---|---|---|---|---|
HR + /HER2− | Triple-negative | Total | |||
0 | Low | 0 | Low | ||
HER2 expression on primary breast cancer | |||||
HR + /HER2− | |||||
0 | 74 (18.9) | 64 (16.4) | 21 (5.4) | 8 (2.0) | 167 (42.7) |
Low | 54 (13.9) | 78 (20.0) | 9 (2.3) | 9 (2.3) | 150 (38.5) |
Triple-negative | |||||
0 | 5 (1.2) | 3 (0.8) | 31 (7.9) | 8 (2.0) | 47 (11.9) |
Low | 2 (0.5) | 3 (0.8) | 11 (2.8) | 11 (2.8) | 27 (6.9) |
Total | 135 (34.5) | 148 (38.0) | 72 (18.4) | 36 (9.1) | 391 (100) |
