Sarcomatoid intrahepatic cholangiocarcinoma with good patient prognosis after treatment with Huaier granules following hepatectomy: A case report

Figure 2 Histological characteristics and immunohistochemical images of the described patient with sarcomatoid intrahepatic cholangiocarcinoma. A and B: The tumor consists of poorly differentiated intrahepatic cholangiocarcinoma (right) and spindle cells as the sarcomatoid component (left), which are intermingled (H&E stain, 40 × and 100 ×, respectively); C: Immunohistochemical staining showed sarcomatoid components stained with diffuse vimentin (vimentin staining, 200 ×); D: Immunohistochemistry showed positive expression of cytokeratin 19 (CK19) in cholangiocarcinoma cells (CK19 staining, 200 ×); E: Immunohistochemistry showed positive expression of pan-CK in cholangiocarcinoma cells (pan-CK staining, 200 ×); F: Immunohistochemistry showed negative expression of hepatocyte paraffin 1 (HepPar-1) in the cells (HepPar-1 staining, 200 ×). iCCA: Intrahepatic cholangiocarcinoma; H&E: Hematoxylin and eosin; CK19: Cytokeratin 19; pan-CK: Pan-cytokeratin; HepPar1: Hepatocyte paraffin 1.