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Page 6 of 12                Pedica et al. Hepatoma Res 2021;7:71  https://dx.doi.org/10.20517/2394-5079.2021.89




















                                  Figure 8. Cystoadenocarcinoma of the liver (haematoxylin-eosin staining, 20×).






















                              Figure 9. Combined hepatocellular-cholangiocarcinoma (haematoxylin-eosin staining, 20×).























                          Figure 10. Cholangiolocarcinoma together with small duct type iCCA (haematoxylin-eosin staining, 20×).

               Carcinosarcoma and the undifferentiated carcinoma of the biliary tree do exist, although they are very rare,
               the first showing both components [Figure 11], the sarcoma differentiation lacking the epithelial
                                                                            [1]
               differentiation and the second showing only the epithelial differentiation .
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