Immunostaining of tumour cells with CD117 (Dako, 1:500 dilution), S-100 (Dako, 1:400 dilution), CK-WSS (Dako, 1:500 dilution), CK AE1-AE3 (Dako, 1:200 dilution), Vimentin (Dako, 1:100 dilution) and Chromogranin (Dako, 1:1000 dilution) antibodies did not yield any positive reaction. This evidence concerns the gene VIM and neoplasm.