In contrast, PML and DDIT4 showed no correlation (Spearman’s r = 0.081, p = 0.281) in lung squamous cell carcinomas (Fig. 7C)49; whereas, PML and TAP1 were positively correlated (Spearman’s r = 0.566, p < 0.01). This evidence concerns the gene DDIT4 and squamous cell lung carcinoma.