TP53 and renal pelvis/ureter urothelial carcinoma: Although UTUC has been found to have similar genetic mutations as UCB [27], a recent genomic characterization of UTUC by Sfakanios et al. [28] reported significant differences in the prevalence of certain mutations, e.g., FGFR3 mutations are more common in UTUC whereas mutations in TP53 are more common in UCB.