FKBP4 gene was consistently over expressed in CaP tissues as the ΔCq estimates in 14 out of 15 CaP samples of FKBP4 gene elevated by a range of 1.2–26.72 fold compared to the mean level of normalized FKBP4 expression estimated in 15 BPH samples. This evidence concerns the gene FKBP4 and benign prostatic hyperplasia.