Table 1 Association between disease grade and copy number
| Grade | Normal copy number | 1 or 2 extra copies | 3 or 4 extra copies | > 4 extra copies |
|---|---|---|---|---|
| BB (n = 7) | 7 | 0 | 0 | 0 |
| DCIS (n = 29) | 16 | 8 | 4 | 1 |
| Well diff. (n = 1) | 1 | 0 | 0 | 0 |
| Moderately diff. (n = 13) | 2 | 5 | 5 | 1 |
| Poorly diff. (n = 10) | 2 | 6 | 1 | 1 |
