Table 4. Nodal status and lymphovascular invasion in pure IDC vs IDC-DCIS.
|
IDC-DCIS
|
|||||
|---|---|---|---|---|---|
| Characteristics | All cases | Pure IDC | All IDC–DCIS | Small IDC–large DCIS | Large IDC–small DCIS |
| Lymph node status | |||||
| Negative | 66.4 (900) | 58.9 (320) | 62.3 (384) | 72.0 (136) | 55.4 (123) |
| 1–3 lymph nodes | 22.2 (301) | 26.7 (145) | 25.3 (156) | 17.5 (33) | 29.7 (66) |
| 4–9 lymph nodes | 6.9 (94) | 8.7 (47) | 7.6 (47) | 6.3 (12) | 10.8 (24) |
| >9 lymph nodes | 3.2 (43) | 5.0 (27) | 2.6 (16) | 1.1 (2) | 3.6 (8) |
| Unknown | 1.3 (17) | 0.7 (4) | 2.1 (13) | 3.2 (6) | 0.5 (1) |
| Lymphovascular invasion | |||||
| Negative | 65.2 (884) | 60.8 (330) | 58.3 (359) | 73.0 (138) | 42.3 (94) |
| Positive | 34.8 (471) | 39.2 (213) | 41.7 (257) | 27.0 (51) | 57.7 (128) |
| Total number | 1355 | 543 | 616 | 189 | 222 |
Abbreviations: IDC=invasive ductal carcinoma; DCIS=ductal carcinoma in situ. Data are presented as percentages, with total case numbers following in parentheses.