Whole exome sequencing of DNA extracted from urinary and serum exosomes, bladder tumor tissues, and normal tissues revealed that gene mutations common in BC (RXRA, TP53, FGFR3) that often occur in BC, as well as 30 UTR variants, in the DNA of exoDNA from the tumor tissue and urine [110,111]. This evidence concerns the gene FGFR3 and breast cancer.