Table 2.
Detailed histology of the lesions included in the study
| Histopathology result | Total | ACR A | ACR B | ACR C | ACR D |
|---|---|---|---|---|---|
| Malignant | 425/808 (52.6%) | 51/83 (61.4%) | 264/457 (57.8%) | 73/182 (30.4%) | 37/86 (43%) |
| Invasive carcinoma NST | 247 | 27 | 159 | 39 | 22 |
| Ductal carcinoma in situ | 81 | 7 | 51 | 15 | 8 |
| Invasive lobular carcinoma | 76 | 13 | 45 | 15 | 3 |
| Other malignant lesions | 21 | 4 | 9 | 4 | 4 |
| Benign | 383/808 (47.4%) | 32/83 (38.6%) | 193/457 (42.2%) | 109/182 (59.9%) | 49/86 (57.0%) |
| Fibrosis/FCC/fibroadenomatoid hyperplasia | 197 | 14 | 98 | 61 | 24 |
| Fibroadenoma | 142 | 10 | 73 | 39 | 20 |
| Papilloma/Papillomatosis | 17 | 2 | 11 | 3 | 1 |
| ADH | 12 | 3 | 5 | 2 | 2 |
| LCIS | 3 | 0 | 1 | 1 | 1 |
| Other benign lesions | 12 | 3 | 5 | 3 | 1 |
NST – non-special type, FCC – fibrocystic changes, ADH – atypical ductal hyperplasia, LCIS – lobular carcinoma in situ