On histopathological examination, the tumor was diagnosed as chondroma (Figure 4J); Vimentin (Figure 4K), S-100 (Figure 4L) and Ki-67(2%) stained positive, but EMA, CK, CK18, CD34, SOX-9 and GFAP stained negative by ICH. The gene discussed is MUC1; the disease is chondroma.