Carcinoma of the prostate deserves the close attention both of the medical profession at large and of all urologists, because in existing circumstances its incidence is increasing and its prognosis is bad. Thus, Moore1 found it in 21 per cent of autopsies on men past 41 and Duff2 reported that its frequency as a cause of death among male policyholders of the Metropolitan Life Insurance Company rose from 0.8 per hundred thousand in 1917 to 3.7 in 1928. This rise seems to be due, not to a heightened individual susceptibility to cancer, but to a striking increase in longevity. For example, the number of men living past the age of 65 doubled in the United States between 1911 and 1935; between 1911 and 1941 life expectancy of males at birth increased from 48.2 to an estimated 63.4 years. Despite this increase, early prostatic carcinoma continues to be a