Table 1: Immunohistochemical markers
| Antibody | Clone | Expression in tumor |
| Gross cystic disease fluid protein -15(GCDFP -15) | 23A3 | Focally positive |
| Mammaglobin | 304-1A5 | Negative |
| Wilms' tumor protein (WT1) | 6F-H2 | Negative in tumor cells, positive in serous epithelium |
| Estrogen receptor α | EP1 | 3+ in 85% of tumor cells |
| Progesteron receptor | PgR636 | 3+ in 85% of tumor cells |
| Human epidermal growth factor receptor (HER2) | Polyclonal C-erbB-2 Oncoprotein | Negative |
| p53 Protein | DO-7 | Wild type expression |
| Ki67 | MIB-1 | < 10% positive nuclei in invasive carcinoma |