According to the pathological diagnostic report from other hospital, myofibroblastoma was considered, and the immunohistochemical staining shows tumor cells were positive for SMA and Vimentin and negative for S100, CD68, CD34, EMA, P53, HMB45 and MART-1, the proliferative index Ki67 is 10%. This evidence concerns the gene MKI67 and myofibroblastoma.