The spindle cell component expressed vimentin (Dako), desmin (Invitrogen, Camarillo, CA) in 10% of tumour cells, and myogenin (Dako) in 10% of tumour cells indicating partial rhabdomyosarcoma-like differentiation, EGFR (Invitrogen), and CD56 (Invitrogen). The gene discussed is DES; the disease is neoplasm.