Table 1.
Basic demographic data for 650 evaluable breast cancer cases
| Mean tumor size (mm) ± standard deviation (SD) |
29.6 ± 16.8 |
| Mean age at diagnosis (years) ± standard deviation (SD) |
63.8 ± 14.2 |
| Number (n) |
Percent (%) |
|
|---|---|---|
| Tumor stage | ||
| pT1 | 181 | 27.9 |
| pT2 | 350 | 53.8 |
| pT3 | 35 | 5.4 |
| pT4 | 84 | 12.9 |
| Lymph node involvement | ||
| pN0 | 355 | 54.7 |
| pN1 | 226 | 34.8 |
| pN2 | 68 | 10.5 |
| Tumor grade | ||
| 1 | 143 | 22 |
| 2 | 259 | 39.8 |
| 3 | 248 | 38.2 |
| Histologic subtype | ||
| Invasive ductal | 482 | 76.4 |
| Invasive lobular | 72 | 11.4 |
| Mucinous | 23 | 3.6 |
| Apocrine | 3 | 0.5 |
| Cribriform | 14 | 2.2 |
| Papillary | 8 | 1.3 |
| Medullary | 29 | 4.6 |
| Intrinsic subtype | ||
| Luminal A (ER+ and/or PR+, HER2−, Ki-67 < 14 %) |
83 | 12.8 |
| Luminal B (HER2-negative) (ER+ and/or PR+, HER2−, Ki-67 ≥ 14 %) |
309 | 47.7 |
| Luminal B (HER2-positive) (ER+ and/or PR+, HER2+) |
73 | 11.3 |
| HER2 type (ER− or PR−, HER2+) | 56 | 8.6 |
| Basal-like (ER−, PR−, HER2−) | 127 | 19.6 |