Table 1 Non-palpable mammographic solid lesions: BI-RADS classification and preoperative diagnosis by VABB

Benign

Precursor lesion

Malignancy

Total

BI-RADS 3 95% CI

37 (94.9%)

0

2 (5.1%) 0.6%–17.3%

39

BI-RADS 4A 95% CI

34 (89.4%)

2 (5.3%)

2 (5.3%) 0.6%–17.8%

38

BI-RADS 4B 95% CI

16 (66.7%)

2 (8.3%)

6 (25%) 9.8%–46.7%

24

BI-RADS 4C 95% CI

1 (16.7%)

0

5 (83.3%) 35.9%–99.6%

6

Total

88

4

15

107