ERVW-1 and intrahepatic cholangiocarcinoma: We also evaluated the subcellular location of syncytin 1, CD9, and CD47 with ICC staining, showing that these 3 fusion‐related proteins were expressed mainly in the cytoplasm in control cells and PGCCs (Figure 2B), consistent with the western blotting results (for both HCT116 and LoVo cells).