On immunohistochemistry, the tumor cells were positive for smooth muscle actin (DAKO, Glostrup, Denmark) (Figure 19), keratin MNF 116 (a pan-keratin with both high- and low molecular weight keratins from DAKO, Glostrup, Denmark) (Figure 20) and vimentin (DAKO, Glostrup, Denmark)(Figure 21). This evidence concerns the gene VIM and neoplasm.