Table 2.
Pathological features of the patients
| Number of patients | (%) | Valid (%) | |
|---|---|---|---|
| Histological type | |||
| IDC | 252 | 70.6 | 71.6 |
| Invasive lobular carcinoma | 23 | 6.4 | 6.5 |
| Other types (mixed type, micropapillary, etc.) | 77 | 21.6 | 21.9 |
| Unknown | 5 | 1.4 | |
| ER status | |||
| Positive | 269 | 75.4 | 80.3 |
| Negative | 66 | 18.5 | 19.7 |
| Unknown | 22 | 6.1 | |
| PR status | |||
| Positive | 205 | 57.4 | 62.1 |
| Negative | 125 | 35 | 37.9 |
| Unknown | 27 | 7.6 | |
| HER2 overexpression | |||
| Positive | 49 | 13.7 | 84.1 |
| Negative | 259 | 72.6 | 15.9 |
| Unknown | 49 | 13.7 | |
| Tumor focality | |||
| Multifocal | 56 | 15.7 | 16 |
| Unifocal | 295 | 82.6 | 84 |
| Unknown | 6 | 1.7 | |
| Tumor centricity | |||
| Multicentric | 9 | 2.5 | 2.6 |
| Unicentric | 341 | 95.5 | 97.4 |
| Unknown | 7 | 2 | |
| Tumor histologic grade | |||
| Grade 1 | 61 | 17.1 | 18.9 |
| Grade 2 | 156 | 43.7 | 48.3 |
| Grade 3 | 106 | 29.7 | 32.8 |
| Unknown | 34 | 9.5 | |
| In situ component | |||
| Yes | 218 | 61.1 | 75.4 |
| No | 71 | 19.9 | 24.6 |
| Unknown | 68 | 19 | |
| Necrosis | |||
| Yes | 50 | 14 | 16.8 |
| No | 248 | 69.5 | 83.2 |
| Unknown | 59 | 16.5 | |
| Lenfvascular invasion | |||
| Yes | 68 | 19 | 22.4 |
| No | 235 | 65.8 | 77.6 |
| Unknown | 54 | 15.2 | |
| Surgical margin status | |||
| Positive | 27 | 7.5 | 7.8 |
| Negative | 319 | 89.4 | 92.2 |
| Unknown | 11 | 3.1 | |
| Ki67 levels % | |||
| Ki67 ≤ 20 | 119 | 33.3 | 55.1 |
| Ki67 > 20 | 97 | 27.2 | 44.9 |
| Unknown | 141 | 39.5 |