Abstract
The size of the prostate was measured in 11 patients with the prostatic cancer by means of transrectal ultrasonotomography after LHRH analog ([Ser(Bu)6] LHRH) treatment. Prostate volume changed parallel to serum testosterone (T) level and decreased by 17-62% compared with baseline after LHRH analog treatment for 4 months. Two different patterns were observed for the change in prostatic volume. Type A expanded transiently and then decreased gradually, while type B decreased continuously from the beginning with no expansion. After treatment for 4 months, the prostatic volume of type A was significantly less than that of type B. It is suggested that prostatic cancer showing a type A regression curve may be more sensitive to T, resulting in a better prognosis than type B.
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