Benign Prostatic Hyperplasia (BPH)/lower urinary tract symptoms (LUTS) is a disease that significantly affects the quality of life in aging men. Though BPH has been well recognized to present itself as symptomatic or asymptomatic disease, the two forms were thought to be indistinguishable at the molecular level. To elucidate the molecular differences underlying BPH, gene expression profiles from the prostate transition zone were analyzed using microarrays. These results identified several genes that appear to differentiate BPH from individuals with severe symptoms from those with asymptomatic BPH. This application focuses on one of these genes namely, JI^-27. JM-27 (also known as PAGE4/GAGEC1) is remarl