MUC1 and neoplasm: Immunohistochemical analysis showed that the tumor cells stained positive for both mesenchymal markers [smooth muscle actin (Fig. 3C) and cluster of differentiation (CD) 34 glycoprotein (Fig. 3D)] and epithelial markers [cytokeratin (CK) (Fig. 3E) and epithelial membrane antigen (EMA) (Fig. 3F)].