SLC7A4 and neoplasm: The heatmap of DNA methylation revealed significantly higher levels in tumor tissue compared to normal tissue, especially for SLC7A4. The Kaplan–Meier survival curves showed an association between gene expression level and the prognosis of PRAD for FMOD [HR (high) = 0.37; p < 0.001] and SLC7A4 [HR (high) = 0.44; p < 0.001], with a higher level corresponding to better prognosis (Figures 9B,E), while others were not statistically significant (Figures 9C,D,F,G).