Table 1 The distributions of benign, B3 or malignant breast lesions according to BI-RADS-US
BI-RADS category | Total | Benign | Rate (%) | B3 | Rate (%) | Malignant | Rate (%) |
|---|---|---|---|---|---|---|---|
0 | 5 | 3 | 60 | 2 | 40 | 0 | 0 |
2 | 141 | 138 | 97.9 | 3 | 2.1 | 0 | 0 |
3 | 1735 | 1568 | 90.4 | 134 | 7.7 | 33 | 1.9 |
4a | 291 | 235 | 80.8 | 32 | 11.0 | 24 | 8.2 |
4b | 44 | 28 | 63.6 | 4 | 9.1 | 12 | 27.3 |
4c | 21 | 14 | 66.7 | 0 | 0 | 7 | 33.3 |
5 | 8 | 0 | 0 | 0 | 0 | 8 | 100 |