Immunohistochemistry tests for desmin, vimentin, α‐SMA, CK, leukocyte common antigen (LCA), CD34, human melanoma black 45 (HMB45), epithelial membrane antigen (EMA), and S100 are performed in sarcomas to differentiate other tumor types and make a final diagnosis.15 The gene discussed is MUC1; the disease is neoplasm.