Immunohistochemical staining was positive for SMA, desmin, h-caldesmon, Ki67 (positive rate 30%), and negative for S-100, CD117, dog-1, CD34.The tumor in the thigh received external-beam radiotherapy (25Gy given in 10 fractions on week days) and chemotherapy (Lobaplatin 50 mg/m2 intravenously daily) for 3 weeks, to which the tumor showed no response. Here, SMN1 is linked to neoplasm.