The results are as follows: glycine serine and threonine metabolism, renin–angiotensin system, tight junction, non-small cell lung cancer, and melanoma signaling pathways were associated with a high ICI score, while enrichment plots demonstrated that basal transcription factors, lipid metabolism, proteasome, RNA polymerase, and ribosome pathway were associated with a low ICI score (Figure 13H). This evidence concerns the gene REN and melanoma.