Adenoma and Adenocarcinoma of the Small Intestine
Supplemental Studies
Immunohistology
| Small Intestine Adenocarcinoma | Small Intestine Normal Mucosa | |
| MUC1 | 52-82% | Negative vs basal staining |
| MUC5AC | 28-54% | Negative, but goblets and gastric metaplasia positive |
| Small Intestine Adenocarcinoma | Colorectal Adenocarcinoma | |
| Racemase | 5% | 62% |
| CK7 | 100% | 5-10% |
| CK20 | 67% | 95% |
| Small intestinal mucin antigen (SIMA) | 50% | 94% |
| Villin | 67% | 98% |
| CDX2 | 60% | 70-98% |
