| 3rd step: Cytokeratins CK 20 y 7 | ||
|---|---|---|
| CK 20+ | CK 20− | |
| CK7+ | Non-small cell lung cancer | |
| Breast | ||
| Gastric | Serous ovarian | |
| Mucinous ovarian | Endometrial | |
| Pancreas | Pancreas | |
| Biliary tract | Biliary tract | |
| Urothelial origin | Mesothelioma | |
| Endocrine | ||
| Germinal | ||
| CK7− | Colorectal | Squamous lineage |
| Merkel cell | Prostate | |
| Gastric | Kidney | |
| Mucinous ovarian | Hepatocellular carcinoma | |
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