SMA showed patchy immunopositivity in the tumor cells, while S100, SOX10, HMB45, CAM5.2, EMA, cytokeratin AE1/AE3, desmin, myogenin, CD34, ERG, CD31, HHV 8, INSM1, WT1, STAT6, LCA, CD21, ALK1, caldesmon, smooth muscle myosin heavy chain, Melan-A, CK5/6, p40, MUC4, NUT, GATA3, CD21, and CD23 immunostains were essentially negative. The gene discussed is CR2; the disease is neoplasm.