TARP and Familial prostate cancer: In our research, TARP had the most patients than other genes, 13 (13/78, 16.7%) patients with duplication was detected in TARP.TARP (TCR gamma alternate reading frame protein) which is a marker for T cells and NKT cells and uniquely expressed in males in prostate epithelial cells and prostate cancer cells (Littman et al., 1987).