前列腺癌在世界癌症总发病数中约占十分之一,全球范围内每年约有20万患者死于前列腺癌[1]。在美国男性中,前列腺癌的诊出率和死亡人数在所有癌症中居第2位[2,3]。在我国,前列腺癌的发病率虽然较欧美国家低,但近年来也有比较明显的上升趋 Prostate cancer accounts for about one-tenth of all cancer in the world and about 200,000 people die of prostate cancer each year worldwide [1]. Among American men, the number of diagnoses and deaths of prostate cancer ranks second in all cancers [2,3]. In our country, although the incidence of prostate cancer is lower than that in Europe and the United States, in recent years there is a more obvious upward trend