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The patient was diagnosed with intrahepatic cholangiocarcinoma by liver biopsy and immunohistochemical analysis. (A) Pathological indication of adenocarcinoma (hematoxylin–eosin staining, ×100 magnification). Section showed positive staining for CK19 (B) and negative staining for Arg-1 (C) and HepPar-1 (D) (immunostaining, ×100 magnification).
