Histological types and immunohistochemical profile
| Case | Histology | CK7 | CK20 | Villin | CDX-2 |
|---|---|---|---|---|---|
| CK, cytokeratin. | |||||
| 1 | Colonic, grade 3 | Negative | 3+ | 3+ | 3+ |
| 2 | Papillary, grade 3 | Negative | 3+ | 3+ | 3+ |
| 3 | Mixed (papillary with mucinous component), grade 3 | Negative | 3+ | 3+ | 3+ |
| 4 | Colonic grade 2 | Negative | 1+ | 3+ | 3+ |
| 5 | Papillary, grade 2 | 1+ | 3+ | 3+ | 3+ |
| 6 | Papillary, grade 2 | 1+ | 3+ | 3+ | 3+ |
| 7 | Colonic, grade 2 | 1+ | 3+ | 3+ | 3+ |
| 8 | Colonic, grade 2 | 2+ | 3+ | 3+ | 3+ |
| 9 | Papillary, grade 2 | 3+ | 2+ | 3+ | 2+ |
| 10 | Colonic, grade 2 | 3+ | 3+ | 3+ | 3+ |
| 11 | Papillary nasopharyngeal adenocarcinoma | 3+ | Negative | Negative | Negative |
| 12 | Sinonasal papillary low grade adenocarcinoma | 3+ | Negative | Negative | Negative |