The markers of other sarcoma types, such as Ewing sarcoma marker, FLI‐1 38, chondrosarcoma or neurogenic sarcoma marker, S100 38, liposarcoma marker, PPARγ 39, and leiomyosarcoma marker h‐caldesmon 38, tested negative in tumors formed by SiRb‐OeMyc (Fig. 4D). This evidence concerns the gene CALD1 and malignant peripheral nerve sheath tumor.