PCA3 and neoplasm: These include detection of the androgen receptor variant V7 (AR-V7) [161], circulating miRNAs [162,163,164], TMPRSS2:ERG, and prostate cancer antigen 3 (PCA3) [165,166,167], circulating free DNA (cfDNA) (reviewed in [158]), detection of gene methylation [168,169], and the analysis of tumour-derived exosomes [170].