一、有关流行病学的研究前列腺癌是欧美等西方国家常见的恶性肿瘤。近年来 ,我国前列腺癌的发生率也明显提高。长期以来 ,流行病学的研究发现 ,前列腺癌的主要危险因素与家族史、饮食结构和激素水平等有关。日本男性前列腺癌的发生率是北美男性的 1/ 30 ,但北美的日本移民在生 First, the epidemiological study of prostate cancer is a common malignancy in Western countries such as Europe and the United States. In recent years, the incidence of prostate cancer in China has also significantly improved. For a long time, epidemiological studies found that the main risk factors for prostate cancer were family history, dietary structure and hormone levels. The incidence of male prostate cancer in Japan is 1 in 30 men in North America, but North American Japanese immigrants are born