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Autopsy studies demonstrate a high prevalence of asymptomatic prostate cancer in older men. In this autopsy study, researchers examined the prostate glands of 220 Russian men (mean age, 63) and 100 Japanese men (mean age, 69) who had no histories of prostate cancer and who died of other causes. Russia and Japan were chosen because prostate cancer screening is uncommon in those countries, according to the authors.
The overall prevalence of prostate cancer was 37% in Russian men and 35% in Japanese men, but prevalence increased with age. In the Russian cohort, prevalence was about 45% for men in their 60s and 70s (none were older than 80). In the Japanese cohort, prevalence was 31%, 44%, and 59% for men in their 60s, 70s, and 80s, respectively…