Table 5. Association between clinicopathological factors and lymph node infiltration.
| Clinical characteristics | False negative SLN (N=12) | True positive SLN (N=137) |
|---|---|---|
| Mean age (years ± SD) | 54.6±10.5 | 55.0±11.3 |
| Mean tumor size (cm ± SD) | 1.6±1.0 | 2.3±1.2 |
| Tumor localization | ||
| Diffuse | 2 (17%) | 73 (53%) |
| Superior (external/internal/central) | 7 (58%) | 46 (34%) |
| Inferior (external/internal/central) | 2 (17%) | 9 (7%) |
| Midline (external/internal) | 1 (8%) | 5 (3%) |
| Areolar or retro-areolar | 0 (0%) | 4 (3%) |
| Bloom score | ||
| 1 | 7 (58%) | 28 (20%) |
| 2 | 3 (25%) | 61 (45%) |
| 3 | 2 (17%) | 33 (24%) |
| UNK | 0 (0%) | 15 (11%) |
| Cancer type | ||
| Ductal carcinoma | 12 (100%) | 106 (77%) |
| Lobular carcinoma | 0 (0%) | 30 (22%) |
| Others* | 0 (0%) | 1 (1%) |
| Estrogen receptor positive | 11 (92%) | 123 (90%) |
| Progesterone receptor positive | 8 (67%) | 95 (69%) |
| HER 2 amplified | 1 (8%) | 22 (16%) |
*, tubular carcinoma, canalicular-lobular carcinoma, carcinoma canalicular infiltrant, mucinous carcinoma, tubulolobular carcinoma, papillary carcinoma, colloidal carcinoma, micropapillary canalicular carcinoma, adenosquamous carcinoma. SLN, sentinel lymph node; SD, standard deviation; UNK, unknown.