Table 1 Histopathologic varieties of BI-RADS category 4 and 5 abnormalities
Histologic diagnosis | BI-RADS 4 (n = 704, 46.2%) | BI-RADS 5 (n = 820, 53.8%) | Total (n = 1524) |
|---|---|---|---|
Malignant (n = 1165, 76.5%) | |||
Ductal carcinoma in situ | 25 | 51 | 76 |
Invasive ductal carcinoma | 223 | 619 | 842 |
Mucinous carcinoma | 30 | 10 | 40 |
Invasive lobular carcinoma | 39 | 59 | 98 |
Papillary carcinoma | 37 | 3 | 40 |
Micropapillary carcinoma | 29 | 4 | 33 |
Tubular carcinoma | 6 | 15 | 21 |
Mixed invasive lobular and tubular carcinoma | 1 | 4 | 5 |
Malignant phyllodes tumor | 10 | – | 10 |
Benign (n = 359, 23.5%) | |||
Atypical ductal hyperplasia | 62 | 32 | 94 |
Intraductal papillomatosis | 47 | – | 47 |
Fibrocystic changes | 21 | 14 | 35 |
Fibroadenoma | 40 | – | 40 |
Pseudoangiomatous stromal hyperplasia | 30 | 1 | 31 |
Benign phyllodes tumor | 13 | – | 13 |
Epithelosis | 37 | – | 37 |
Nodular sclerosis/sclerosis adenosis | 39 | 7 | 46 |
Infectious mastitis | 3 | – | 3 |
Granulomatous mastitis | 9 | – | 9 |
Fat necrosis | 3 | 1 | 4 |