The tumor cells are negative for CD3, CD20, CD30, alpha-fetoprotein, beta human chorionic gonadotrophin, pan-cytokeratin, CAM5.2, myogenin, epithelial membrane antigen, thyroid transcription factor-1, CK20, desmin, smooth muscle actin, HMB45, S100, and WT1. This evidence concerns the gene WT1 and neoplasm.