**Figure 2.** **The expression landscape of PRGs in LSCC patients.** (**A**) The heatmap of the 47 PRGs between LSCC tissues and adjacent normal tissues. *P*-values are as follows: ^{*}*P* < 0.05; ^{**}*P* < 0.01; ^{***}*P* < 0.001. (**B**) The boxplots of differential expression of PRGs between LSCC samples and normal tissues. (**C**) The PPI network of the PRGs using the STRING database. (**D**) The correlation network of the PRGs (red line: positive correlation; blue line: negative correlation. The depth of the colors represents the degrees of correlation).