Table 1.
Patient characteristics.
| DCIS (n = 31) | Invasive ≤15 mm (n = 36) | Mixed lesion (n = 42) | |
|---|---|---|---|
| Age, years (median) | 57.5 | 58.8 | 57.5 |
| Size, mm (median) | 20 (3 multifocal) | 11.5 | 15 (4 multifocal) |
| Grade, I–III and/or A–C* | 1/15/15 | 17/15/4 | Inv.: 12 (I)/21 (II)/9 (III) |
| DCIS: 5 (A)/13 (B)/17 (C) | |||
| Immunohistochemistry: | Number (%) | Number (%) | Number (%) |
| ER+ | 22 (71%) | 31 (86%) | 34 (81%) |
| PR+ | 20 (65%) | 28 (78%) | 26 (62%) |
| Ki‐67+ | 6 (19%) | 9 (25%) | 18 (43%) |
| HER2+ (2+ or 3+) | 20 (65%) | 17 (47%) | 33 (78.5%) |
| P53+ | 15 (48%) | 18 (50%) | 14 (33%) |
| Breast cancer subtypes: | |||
| Luminal A | 7 (23%) | 8 (22%) | 9 (21%) |
| Luminal B | 7 (23%) | 11 (30%) | 12 (28.5%) |
| ERBB2+ | 2 (6%) | 5 (14%) | 9 (21%) |
| Basal‐like | 6 (19%) | 6 (17%) | 8 (19%) |
| Normal‐like | 9 (29%) | 6 (17%) | 4 (9.5%) |
* ELSTON grading of invasive tumours designated as I–III. EORTC grading of DCIS tumours designated as A–C. Inv: Invasive.