DES and neoplasm: His immunohistochemistry analysis showed that the tumor cells were positive for vimentin, CD34 (Figure 3d), BCL-2 and beta-catenin, and negative for pan Cytokeratin, p63, Calretinin, SMA, desmin, S100, CD-31, CD-117, DOG1, EMA, STAT6, GRIA2 and WT-1.