The heatmap in Figure 2D showed the expression levels of these 20-potential prognostic ferroptosis-related DEGs in LUAD and normal lung tissues, from which we could found that only 4 genes (ALOX15, DUOX1, CDO1, and IL33) were highly expressed in normal tissues, while the remaining 16 genes were highly expressed in tumor tissues. This evidence concerns the gene CDO1 and neoplasm.