title: Urology.
abstract: Both age and prostate volume appear to influence the PSA level, and a varying set of normal values may be adopted. The relative benefit of radical prostatectomy or radiation therapy over watchful waiting for treating men older than 70 years with localized prostate cancer is extremely small.
authors.affiliation: University of Chicago Pritzker School of Medicine, Ill.
authors.forename: G W
authors.initials: GW
authors.lastname: Chodak
mesh_terms: D006801:Humans; D008297:Male; D011471:Prostatic Neoplasms / Q000175:diagnosis / Q000628:therapy; D014481:United States; D014572:Urology / Q000639:trends*