Table 1.
Characteristics of the malignant cases in the data set
| Malignant cases | Mean age (SD) | N Symptomatic:screening | N FFDM neg:pos |
Mean lesion size in mm (SD) | Lymph node metastasis | HR+ HER2- | HR+ HER2+ | HR- HER2+ | HR- HER- | Unknown receptor status | †Grade I | †Grade II | †Grade III | Grade unknown |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total (n = 30) | 49.8 (12.1) | 17:13 | 20:10 | 16.0 (8.8) | 8 | 16 | 2 | 3 | 4 | 4 | 4 | 14 | 10 | 2 |
| Invasive ductal carcinoma (n = 22) | 48 (11.1) | 15:7 | 14:8 | 16.9 (9.9) | 6 | 11 | 2 | 3 | 3 | 3 | 2 | 10 | 8 | 2 |
| Invasive lobular carcinoma (n = 3) | 73.5 (4.9) | 1 : 2 | 2 : 1 | 14.7 (5.5) | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 |
| Invasive metaplastic carcinoma (n = 2) | 47.0 (14.1) | 1 : 1 | 1 : 1 | 16.5 (2.1) | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 2 | 0 |
| Invasive tubular carcinoma (n = 1) | 52 | 0 : 1 | 1 : 0 | 7 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Invasive intracystic papillary carcinoma (n = 1) | 45 | 0 : 1 | 1 : 0 | 12 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Non-invasive intracystic papillary carcinoma (n = 1) | 49 | 0 : 1 | 1 : 0 | 14 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
†Nottingham histological grade (modified Bloom-Richardson-Elston)
FFDM Full-field digital mammography
HR Hormone receptor status (oestrogen and progesterone receptors)
HER2 Human epidermal growth factor receptor 2 status