KRT7 and neoplasm: Immunohistochemistry was performed post-operatively and the results showed that the tumor cells were positive for epithelial markers, cytokeratin 7 (CK7), CK19 and epithelial membrane antigen (EMA) (Fig. 7), and mesenchymal markers, cluster of differentiation (CD)34, CD99 and Vimentin (Vim) (Fig. 8).