Furthermore, it was found through partition of chi-square that the positive expression rate of mTOR in the CSCC group was higher than that in the BD group and AK group (χ2 = 4.44, P < 0.05; χ2 = 8.15, P < 0.01), while it was higher in the BD group and AK group than that in the normal skin group (χ2 = 7.94, P < 0.01; χ2 = 4.36, P < 0.05). This evidence concerns the gene MTOR and Behcet disease.