MLKL and papillary renal cell carcinoma: The expression levels of MLKL and CASP8 in tumor samples were higher than those in normal tissues in KIRC (Renal Clear Cell Carcinoma), KIRP (Papillary Renal Cell Carcinoma), and BLCA (Bladder Urothelial Carcinoma) (Fig. S2A, S3B, Table S1).