TABLE I.
Immunohistochemistry of the patients in the case series
| Case |
Markers
|
|
|---|---|---|
| Positive | Negative | |
| 1 | gcdfp-15, CK7, cea, alcian blue | CDX2, CK20, S100 |
| 2 | CK7, cea, muc1, Ki67, androgen receptor, alcian blue | CDX2, CK20, S100, ttf1, muc2, muc5a |
| 3 | na | na |
| 4 | Cytokeratin AE1/AE3, gcdfp-15, androgen receptor | Prostate-specific antigen, estrogen receptor, progesterone receptor, her2 (fish) |
| 5 | CK7, cea, alcian blue | CK20, S100, prostate-specific antigen, androgen receptor, estrogen receptor, progesterone receptor, her2 |
| 6 | na | na |
gcdfp-15 = gross cystic disease fluid protein; CK = cytokeratin; cea = carcinoembryonic antigen; ttf1 = thyroid transcription factor 1; na = not available; her2 = human epidermal growth factor receptor 2; fish = fluorescence in situ hybridization.