Table 3. Frequency of the different B3 lesions from the biopsies and the rate of malignant diagnosis after excision.
| B3 lesion | Frequency | Malignant diagnosis after excision | PPV | χ2 | p |
|---|---|---|---|---|---|
| LN | 6 | 2 | 0.33 | 0.560 | FEp = 0.602 |
| ADH | 15 | 6 | 0.40 | 3.893 | FEp = 0.075 |
| PL | 38 | 6 | 0.15 | 1.411 | 0.235 |
| FEA | 9 | 2 | 0.22 | 0.005 | FEp = 1.000 |
| RS | 4 | 0 | 0 | 1.146 | FEp = 0.572 |
| PT | 3 | 0 | 0 | 0.847 | FEp = 1.000 |
| Total | 75 | 16 | 0.21 |
χ2: Chi square test FE: Fisher Exact p: p value for comparing between the studied groups
LN = non-invasive lobular neoplasia; ADH = atypical ductal hyperplasia; PL = Papillary lesion; FEA = flat epithelial atypia; RS = radial scar; PT = phyllodes tumor