Immunohistochemically, tumor cells were positive for CK, EMA, Vimentin, CD117, CK7, Mammaglobin (Fig. 4a), S100 (Fig. 4b) and SOX10, but negative for DOG1, CD56, Cga, Syn, CK20, Calponin, SMA, NapsinA and TTF1. This evidence concerns the gene SOX10 and neoplasm.