Table 1. Clinicopathologic characteristics of 997 cases with breast carcinoma of 964 patients.
| Clinicopathologic parameters | n (%) | |
|---|---|---|
| Age (years) | < 50 | 510 (52.9%) |
| ≥ 50 | 454 (47.1%) | |
| Specimen | Core biopsy | 14 (1.4%) |
| Mammotome biopsy | 8 (0.8%) | |
| Excision | 27 (2.7%) | |
| Lumpectomy (partial mastectomy) | 598 (60.0%) | |
| Total mastectomy | 350 (35.1%) | |
| T stage (11 cases, repeat exam) (10 cases, not assessable) |
Tis | 158 (16.2%) |
| T1 | 506 (51.8%) | |
| T2 | 267 (28.3%) | |
| T3 | 42 (4.3%) | |
| T4 | 3 (0.3%) | |
| N stage (11 cases, repeat exam) (65 cases, not assessable) |
Metastasis present (N1, 2, 3) | 280 (30.4%) |
| Metastasis absent (N0) | 641 (69.6%) | |
| Histologic diagnosis (11 cases, repeat exam) (6 cases, not assessable) |
Invasive ductal carcinoma | 695 (70.9%) |
| Ductal carcinoma in situ | 149 (15.2%) | |
| Invasive lobular carcinoma | 57 (5.8%) | |
| Lobular carcinoma in situ | 6 (0.6%) | |
| Mixed invasive ductal and lobular carcinoma |
8 (0.8%) | |
| Mucinous carcinoma | 30 (3.1%) | |
| Metaplastic carcinoma | 12 (1.2%) | |
| Invasive micropapillary carcinoma | 9 (0.9%) | |
| Tubular carcinoma | 5 (0.5%) | |
| Encapsulated papillary carcinoma | 4 (0.4%) | |
| Solid papillary carcinoma | 3 (0.3%) | |
| Giant cell carcinoma | 2 (0.2%) | |
| Nuclear grade (11 cases, repeat exam) (7 cases, not assessable) |
Low | 128 (13.1%) |
| Intermediate | 587 (59.9%) | |
| High | 265 (27.0%) | |
| Immuno-histochemical stain (11 cases, repeat exam) |
ER positive | 777 (78.8%) |
| ER negative | 209 (21.2%) | |
| PR positive | 696 (70.6%) | |
| PR negative | 290 (29.4%) | |
| HER2 positive | 183 (18.6%) | |
| HER2 equivocal | 39 (4.0%) | |
| HER2 negative | 764 (77.5%) | |