Table 2.
Baseline DCIS biopsy and histopathological features.
| Feature | Number | % of total | % of stated/known |
|---|---|---|---|
| Biopsy type | |||
| 14 gauge core | 204 | 66 | 67 |
| Vacuum-assisted | 100 | 32 | 33 |
| Other | 2 | 1 | 1 |
| Not stated | 5 | 2 | |
| DCIS grade | |||
| High | 123 | 40 | 40 |
| Intermediate | 105 | 34 | 35 |
| Low | 76 | 24 | 25 |
| Not stated | 7 | 2 | |
| Necrosis | |||
| Present | 89 | 29 | 36 |
| Not present | 157 | 50 | 64 |
| Not stated | 65 | 21 | |
| Microinvasion | |||
| Present | 10 | 3 | 4 |
| Possible | 15 | 5 | 6 |
| Absent | 237 | 76 | 90 |
| Not stated | 49 | 16 | |
| ER status | |||
| Positive | 115 | 37 | 87 |
| Negative | 17 | 5 | 13 |
| Not known | 109 | 35 | |
| Not stated | 70 | 23 | |
| PR status | |||
| Positive | 42 | 14 | 72 |
| Negative | 16 | 5 | 28 |
| Not known | 169 | 54 | |
| Not stated | 84 | 27 | |
| HER2 status | |||
| Positive | 4 | 1 | 31 |
| Negative | 9 | 3 | 69 |
| Not known | 199 | 64 | |
| Not stated | 99 | 32 | |