Immunohistochemical analysis revealed the following results: Tumor cells were negative for Ckp, positive for desmin and actin, negative for myogenin, positive for MyoD1, and negative for CgA, S-100, Syn, h-caldesmon, SMA, Sox-10, Pax-8, and GATA3. The gene discussed is MYOD1; the disease is neoplasm.