| Lesion type | <25 years | 26 - 35 | 36 - 45 | 46 - 55 | >56 | Total |
| Carcinoma | 1 | 4 | 9 | 3 | 8 | 25 |
| Fibrocystic changes | 9 | 3 | 3 | 3 | 1 | 19 |
| Fibroadenoma | 2 | 2 | 0 | 0 | 0 | 4 |
| Papilloma | 0 | 0 | 0 | 1 | 0 | 1 |
| Fat necrosis | 1 | 0 | 0 | 0 | 0 | 1 |
| Total | 13 | 9 | 12 | 7 | 9 | 50 |