前列腺癌是欧美等一些西方国家中老年男性最常见的恶性肿瘤。如在美国,前列腺癌列男性恶性肿瘤发病率的首位和死亡率的第2位(仅次于肺癌)〔1〕。流行病学研究表明,前列腺癌的发病有明显种族差异和遗传倾向,但机体内外环境因素对其发生发展也有重要影响。近年来有关胰岛素样生长 Prostate cancer is the most common malignancy among middle-aged and older men in western countries such as Europe and the United States. For example, in the United States, prostate cancer ranks first in the incidence of male malignancy and second in mortality (second only to lung cancer) [1]. Epidemiological studies have shown that the incidence of prostate cancer has obvious ethnic and genetic tendencies, but the internal and external environmental factors also have an important impact on its occurrence and development. Insulin-like growth in recent years