PCA3 overexpression, TMPRSS2-ERG gene fusion, GSTP1 promoter hypermethylation, somatic mutations in the AR gene and the IVS1-27G > A polymorphism in the KLF6 gene were studied.     ///    The TMPRSS2-ERG positive status correlates with moderate to poorly differentiated prostate tumors and it is considered as unfavorable disease predictor. 