| β-hCG | Beta-human chorionic gonadotropin |
| CCA | Cholangiocarcinoma |
| LM | Liver metastases |
| BBD | Benign biliary disease |
| HCC | Hepatocellular carcinoma |
| AFP | Alpha-fetoprotein |
| CA19-9 | Carbohydrate antigen 19-9 |
| CEA | Carcinoembryonic antigen |
| LHCGR | Luteinizing hormone/choriogonadotropin receptor |
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