Moreover, as shown in Figure 1D, the KRT84 expression level was obviously reduced with the increase of OSCC tumor grade (G1 vs. G2, 6.68 vs. 4.60, P = 7.89 × 10−3; G1 vs. G3, 6.68 vs. 3.59, P = 6.79 × 10−4; G2 vs. G3, 4.60 vs. 3.59, P = 0.041). This evidence concerns the gene KRT84 and neoplasm.