Table 2.
Diagnoses of the benign lesions
| Diagnosis | Pathology | Follow up | n (training) | n (validation) |
| Fibroadenoma | 75 | 58 | 133 | 37 |
| Fibrosis | 68 | 1 | 69 | 8 |
| Cyst | 15 | 54 | 69 | 19 |
| Fat necrosis | 4 | 27 | 31 | 7 |
| Adenosis | 4 | 0 | 4 | 1 |
| Normal breast tissue | 2 | 0 | 2 | 1 |
| Duct ectasia | 2 | 2 | 4 | 2 |
| Scar | 1 | 208 | 209 | 69 |
| Abscess | 1 | 0 | 1 | 0 |
| Oil cyst | 1 | 0 | 1 | 0 |
| Hamartoma | 1 | 0 | 1 | 0 |
| Fat lobe | 1 | 5 | 6 | 1 |
| Usual ductal hyperplasia | 1 | 0 | 1 | 0 |
| Lymph node | 0 | 7 | 7 | 4 |
| Focal dense breast tissue | 0 | 3 | 3 | 1 |
| Haematoma | 0 | 2 | 2 | 0 |
| Seroma | 0 | 2 | 2 | 0 |
| Atheroma | 0 | 1 | 1 | 0 |
| Lipoma | 0 | 1 | 1 | 0 |
| Varicose vein | 0 | 1 | 1 | 0 |
| Benign (not further specified) | 0 | 5 | 5 | 5 |
| Total number of lesions | 176 | 377 | 398 | 155 |
| Total number of patients | 173 | 377 | 396 | 154 |