Immunohistochemically, the tumor cells were focally positive for desmin (Fig. 1d) and heavy isoform of caldesmon (h-caldesmon, clone: h-CD, Dako, Glostrup, Denmark) (Fig. 1e) and negative for smooth muscle actin (SMA) and rhabdomyoblastic markers, including Myogenin and MyoD1. This evidence concerns the gene CALD1 and neoplasm.