Immunohistochemically, the tumor cells showed diffuse positivity for S100, CD34, and vimentin; focal positivity for TFE-3; and negative expression of CD31, desmin, EMA, myogenin, cytokeratin (AE1/AE3), SMA, p63, SOX10, HMB45, pan-TRK, and cytokeratin 5/6. This evidence concerns the gene CD34 and neoplasm.