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Immunohistochemical identification of the primary site of invasive micropapillary carcinoma
| Protein/marker | Colon and rectum | Stomach | Pancreas1 | Breast | Bladder | Ovary | Lung | Salivary glands |
| CK20 | + | - | - | + | + | + | + | + |
| CK7 | - | + | + | - | + | - | - | - |
| TTF-1 | - | - | ND | - | - | - | + | ND |
| SP-A | - | - | ND | - | - | - | + | ND |
| ER | - | +/- | ND | +/- | - | +/- | - | - |
| PgR | - | - | ND | +/- | - | +/- | - | - |
| CA 125 | +/- | ND | ND | - | + | + | ND | ND |
| CA 19-9 | ND | ND | + | ND | ND | ND | ND | ND |
| CEA | + | ND | - | ND | ND | ND | ND | ND |
And other sites in gastrointestinal tract. ND: No data.
