Table 2.
Comparison of histological and immunohistochemical characteristics between HER2-positive BCP and HER2 non-BCP groups.
| HER2-positive BCP (n = 51) | HER2 non-BCP (n = 51) | P | |
|---|---|---|---|
| Tumor size (mean) (mm) | 40.6 | 36.4 | 0.49 |
| Tumor size (TNM classification) | |||
| T1 | 10 (20.4) | 17 (34) | 0.33 |
| T2 | 20 (40.8) | 21 (42) | |
| T3 | 11 (22.4) | 7 (14) | |
| T4 | 8 (16.3) | 5 (10) | |
| N+, n(%) | 34 (68) | 33 (66) | 0.83 |
| M+, n(%) | 8 (16) | 5 (10.2) | 0.39 |
| Tumor type, n(%) | |||
| Invasive ductal carcinoma | 50 (98) | 50 (98) | 1 |
| Invasive lobular carcinoma | 1 (2) | 1 (2) | |
| Focality, n(%) | |||
| Unifocal tumor | 39 (76.5) | 37 (72.5) | 0.82 |
| Multifocal tumor | 12 (23.5) | 14 (27.5) | |
| Grade SBR, n(%) | |||
| 1 | 1 (2) | 1 (2) | 0.57 |
| 2 | 14 (27.5) | 19 (37.2) | |
| 3 | 36 (70.6) | 31 (60.8) | |
| HR status, n(%) | |||
| Negative | 17 (33.3) | 12 (23.5) | 0.27 |
| Positive | 34 (66.7) | 39 (76.5) | |
| Ki67 rate, n(%) | |||
| <15% | 0 (0) | 2 (3.9) | 0.15 |
| ≥15% | 49 (96.1) | 47 (92.2) | |
| NC | 2 (3.9) | 2 (3.9) | |
| <20% | 3 (5.9) | 8 (15.7) | 0.11 |
| ≥20% | 46 (90.2) | 41 (80.4) | |
| NC | 2 (3.9) | 2 (3.9) | |