Expression of CK19 in tissue microarray (TMA) cases and in whole tissue of special histological types of breast carcinomas
| Invasive breast carcinomas | Total cases (n=116) | CK19 positivity on TMA, n (%) | CK19 positivity on whole tissue, n (%) |
| Micropapillary | 7 | 7 (100%) | 7 (100%) |
| Apocrine | 21 | 21 (100%) | 21 (100%) |
| Tubular | 14 | 13 (93%) | 14 (100%) |
| Mucinous | 26 | 23 (86%) | 26 (100%) |
| Papillary | 7 | 6 (85%) | 6 (85%) |
| Medullary | 19 | 16 (84%) | 19 (100%) |
| Mixed* | 6 | 5 (83%) | 6 (100%) |
| Lobular | 10 | 8 (78%) | NA† |
| Metaplastic | 6 | 4 (67%) | 5 (80%) |