PAX2 and neoplasm: Immunohistochemical staining revealed that the tumor cells were strongly positive for hepatocyte paraffin 1 (HepPar1) and cytokeratin (CK)7, positive for Villin (Fig. 2D–F), but were negative for AFP, glypican-3, CK20, caudal-related homeobox 2 (CDX2), thyroid transcription factor-1 (TTF1), paired box 2 (PAX2), synaptophysin (Syn), and chromogranin A (CgA).