We noticed that CYP2C8 showed a significantly higher expression in bladder urothelial carcinoma compared with that in normal tissue (http://ualcan.path.uab.edu/cgi-bin/TCGAExResultNew2.pl?genenam=CYP2C8&ctype=BLCA). Here, CYP2C8 is linked to bladder transitional cell carcinoma.