Table 1. Distribution of B3 (lesions of uncertain malignant potential) core needle histology (N=372): type of lesion depicted on mammography, outcomes and palpability.
| Lesion type on mammography |
Excision histology outcome (N=285)a
|
Lesions not excised
|
Total (number palpable)c | |||||
|---|---|---|---|---|---|---|---|---|
| Benign | Atypical hyperplasiasb | DCIS | Invasive cancer | Stable on review | Pending review | |||
| Mass (or density) | 53 | 31 | 15 | 20 | 31 | 16 | 166 | (98) |
| Distortion | 21 | 3 | 1 | 3 | 5 | 2 | 35 | (4) |
| Microcalcification | 39 | 34 | 46 | 19 | 13 | 20 | 171 | (0) |
| Total number | 113 | 68 | 62 | 42 | 49 | 38 | 372 | (102) |
DCIS=ductal carcinoma in situ.
a
This included six cases of suspicious CNB results (retained only for descriptive analysis).
b
‘Atypical hyperplasias’ included atypical ductal hyperplasia and lobular intraepithelial neoplasia (lesions associated with increased future risk of breast cancer).
c
Number palpable=number of lesions from total (and for each type of mammographic lesion) considered to be evident on clinical examination.