Immunohistochemistry showed that tumor cells were CAM5.2 (+), AE1/3 (+), Ber-EP4 (–), EMA (+), CD45 (+), NSE (+), Synaptophysin (–), Chromogranin A (–), CD56 (+), NKX2.2 (–), Vimentin (+), GFAP (–), S-100 (–), Desmin (–), SMA (–), WT1 (–), MyoD1 (–), Myogenin (–) (Figs. 5C–5F). The gene discussed is WT1; the disease is neoplasm.