Immunohistochemical staining showed the tumor was strongly positive for Cytokeratin, S-100, and Calponin, and was negative for epithelial membrane antigen (EMA), glial fibrillary acidic protein (GFAP), human melanoma black45 (HMB45), desmin, and microglobulin (Figure 2). This evidence concerns the gene MUC1 and neoplasm.