KIT and neoplasm: The tumor cells were strongly positive for wide-spectrum cytokeratin, BerEP4, and alpha-fetoprotein (αFP); partially positive for CD117 (C-kit); negative for glial fibrillary acidic protein (GFAP), S-100 protein, CD30, and the beta subunit of human chorionic gonadotropin (βHCG) (Figure 4).