- To build up a large blood and tumor (both fresh and preserved) bank from patients with prostate cancer to identify prostate cancer predisposition gene(s), determine the prevalence and penetrance of prostate cancer predisposition genes in prostate cancer patients, correlate changes in prostate cancer predisposition gene(s) with disease and treatment parameters by matching with clinical data from clinical databases already held as part of the medical record on these patients, and correlate changes in prostate cancer predisposition gene(s) with environmental factors collected by questionnaire from these patients.