Table 4.
Characteristics of the 91 upstaged biopsies
| Grade of IBC component in upstaged cases | Total | ||||
|---|---|---|---|---|---|
| 1-Low | 2-Intermediate | 3-High | Unknown | ||
| Grade of DCIS on preoperative biopsy | |||||
| 1-Low | 16 | 0 | 0 | 0 | 16 |
| 2-Intermediate | 13 | 19 | 7 | 3 | 42 |
| 3-High | 4 | 12 | 8 | 6 | 30 |
| Unknown | 1 | 0 | 2 | 0 | 3 |
| Total pathological size of IBC component (mm) | |||||
| < 5 | 14 | 16 | 4 | 6 | 40 |
| 5–9 | 15 | 11 | 9 | 2 | 37 |
| 10–14 | 2 | 3 | 1 | 0 | 6 |
| 15–20 | 1 | 1 | 3 | 0 | 5 |
| Unknown | 2 | 0 | 0 | 1 | 3 |
| Oestrogen receptor expression in the IBC component | |||||
| Negative | 0 | 3 | 7 | 2 | 12 |
| Positive | 33 | 28 | 10 | 7 | 78 |
| Unknown | 3 | 3 | 1 | 2 | 9 |
| Total | 34 | 31 | 17 | 9 | 91 |
Association between the grade of the invasive breast cancer component and the grade of DCIS on preoperative biopsy (upper panel), and between the size and the grade of the invasive component amongst upstaged biopsies (lower panels)
DCIS ductal carcinoma in situ, IBC: invasive breast cancer