Table 2.
Histological diagnosis.
| Histological Diagnosis | N | % | |
|---|---|---|---|
| Simple benign tumors | Adenoma, simple | 225 | 12.1 |
| Myoepithelioma | 3 | 0.2 | |
| Ductal-associated benign tumors | Intraductal papillary adenoma (duct papilloma) | 11 | 0.6 |
| Nonsimple benign tumors | Complex adenoma | 281 | 15.1 |
| Benign mixed tumor | 329 | 17.6 | |
| Fibroadenoma | 18 | 1.0 | |
| Simple carcinoma | Tubular carcinoma | 231 | 12.4 |
| Tubulopapillary carcinoma | 256 | 13.7 | |
| Solid carcinoma | 130 | 7.0 | |
| Anaplastic carcinoma | 7 | 0.4 | |
| Nonsimple carcinoma | Carcinoma arising in a complex adenoma/benign mixed tumor | 88 | 4.7 |
| Complex carcinoma | 248 | 13.3 | |
| Carcinoma-and-malignant myoepithelioma | 5 | 0.3 | |
| Special type | Adenosquamous carcinoma | 14 | 0.8 |
| Lipidic-rich carcinoma | 2 | 0.1 | |
| Malignant myoepithelioma 1 | 6 | 0.3 | |
| Mucinous carcinoma | 2 | 0.1 | |
| Spindle cell carcinoma | 1 | 0.1 | |
| Others | Osteosarcoma | 5 | 0.3 |
| Carcinosarcoma | 4 | 0.2 | |
| Total | 1866 | 100% |
1 The diagnosis of malignant myoepithelioma was formulated after performing immunohistochemistry with neoplastic cells positive immunostaining for alpha-smooth actin and P63 and negative stain for luminal epithelial markers.