Table 3.
Needless axillary lymph node dissection (ALND) avoided in mDCIS–MI and mDCIS–IDC cases upgraded after mastectomy
| Histologic results on mastectomy | bDCIS (n = 190)a | |||
|---|---|---|---|---|
| mDCIS (n = 114) |
mDCIS–MI (n = 20) |
mDCIS–IDC (n = 56)a |
ALND avoided in mDCIS–MI or mDCIS–IDC | |
| SLN status | ||||
| Negative | 112 | 16 | 35 | 51/51 |
| Positive | 2 | 4 | 21a | 10/25b |
| ITC (≤0.2 mm) | 2 | 1 | 5 | 5/6 |
| Micrometastasis (0.2 ≤ 2 mm) | 0 | 1 | 7 | 4/8 |
| Macrometastasis (>2 mm) | 0 | 2 | 9 | 1/11 |
a1 SLN had missing data
bALND not performed
bDCIS vacuum-assisted biopsy-diagnosed ductal carcinoma in situ, n number of patients, SLN sentinel lymph node, mDCIS mastectomy-diagnosed ductal carcinoma in situ, mDCIS-MI mastectomy-diagnosed ductal carcinoma in situ with microinvasion, IDC invasive ductal carcinoma, mDCIS-IDC mastectomy-diagnosed ductal carcinoma in situ with associated invasive carcinoma, ITC isolated tumour cell