TMPRSS2-ERG gene fusion was evaluated on sections of cell blocks by fluorescence in situ hybridization (FISH) using ERG gene break-apart probes.     ///    Metastatic prostate cancers have a high prevalence of TMPRSS2-ERG gene fusion along with a frequent copy number increase of ERG gene.    ///    "Therefore, an identification of the TMPRSS2-ERG gene fusion may be used to establish the prostatic origin of metastasis.. "    ///    TMPRSS2-ERG gene fusion can be evaluated in FNA specimens of metastatic prostate cancer.     ///    [TMPRSS2-ERG gene fusion in metastatic prostate cancers: a study of fine needle aspiration specimens]..     ///     To investigate diagnostic values of the detection of TMPRSS2-ERG gene fusion in metastatic prostate cancer.     ///    TMPRSS2-ERG gene fusion persists in metastatic prostate cancers and even in those with poorly differentiated SCC features. 