The pairs of Kidney Renal Clear Cell Carcinoma–Kidney Renal Papillary Cell Carcinoma as well as Lung Squamous Cell Carcinoma–Lung Adenocarcinoma and Bladder Urothelial Carcinoma–Uterine Corpus Endometrial Carcinoma appear highly correlated, perhaps due to their common tissue origin, further reinforcing the tissue-specific MMR transcriptomic expression profile hypothesis. This evidence concerns the gene MRC1 and bladder transitional cell carcinoma.