Patient demographics and tumour characteristics for the first 254 patients undergoing GeneSearch intraoperative molecular analysis of sentinel nodes
| Patient characteristic | n | % | Total | |
| Histopathological tumour type | DCIS | 17 | 7 | 256 |
| Invasive ductal | 187 | 73 | ||
| Invasive lobular | 19 | 7 | ||
| Mixed | 21 | 8 | ||
| Other special type | 12 | 5 | ||
| Histopathological lymph node status | Negative | 184 | 72 | 256 |
| Positive | 72 | 28 | ||
| Tumour size | Tis | 17 | 7 | 256 |
| T1 | 139 | 54 | ||
| T2 | 78 | 30 | ||
| T3 | 5 | 2 | ||
| Multifocal | 134 | 5 | ||
| Other (T4=1, pCR=2, MP=1) | 2 | |||
| Tumour grade | Tis | 17 | 7 | 256 |
| 1 | 37 | 14 | ||
| 2 | 142 | 55 | ||
| 3 | 59 | 23 | ||
| MP | 1 | <1 | ||
| Oestrogen receptor status | Positive | 211 | 82 | 256 |
| Negative | 35 | 14 | ||
| Unknown/NA | 10 | 4 | 256 | |
| Progesterone receptor status | Positive | 193 | 75 | |
| Negative | 53 | 21 | ||
| Unknown/NA | 10 | 4 | ||
| HER-2 status | Positive | 29 | 11 | 256 |
| Negative | 192 | 75 | ||
| Indeterminate on IHC | 22 | 9 | ||
| Unknown/NA | 13 | 5 |
There were five bilateral breast cancers, but three patients were excluded (n=251 patients; 256 sentinal node biopsies).
DCIS, ductal carcinoma in situ; IHC, immunohistochemistry; NA, not ascertained (as oestrogen receptor, progesterone receptor and HER-2 status was not always obtained for DCIS); pCR, complete pathological response to neo-adjuvant chemotherapy; MP, malignant phylloides.