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Summary of immunohistochemical staining patterns in tumors with mucinous features
| Pancreatic metastases (% positive) | Lung primaries (% positive) | P-value | |
|---|---|---|---|
| CK20 | 17/26 (65) | 5/18 (28) | 0.03 |
| CDX2 | 17/27 (63) | 1/18 (6) | 0.0001 |
| MUC2 | 4/24 (17) | 1/10 (10) | NS |
| TTF-1 | 1/26 (4) | 16/21 (76) | 0.0001 |
| Napsin A | 0/25 (0) | 3/9 (33) | 0.014 |
| SMAD4 loss (%loss) | 10/27 (37) | 8/28 (28) | NS |
Abbreviation: NS, not significant.
