Research Article
Indeterminate (B3) Breast Lesions and the Ongoing Role of Diagnostic Open Biopsy
Table 1
Malignancy upgrade rate for each B3 lesion subtype.
| | B3 lesion on CNB | Incidence (%) | Benign on surgical excision | Malignant on surgical excision | Malignancy upgrade rate (%) |
| | Atypical papilloma | 68 (44.70%) | 68 | 0 | 0 | | ADH | 47 (30.90%) | 47 | 0 | 0 | | ALH | 4 (2.60%) | 3 | 1 | 25 | | Radial/(CSL) | 33 (21.70%) | 33 | 0 | 0 | | Total | 152 | 151 | 1 | 0.66 |
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