前列腺癌 ( PCa)是欧美国家最常见的肿瘤之一 ,其发病率在美国男性肿瘤中占第 2位 ,约占男性肿瘤的 1 7% ,是 55岁以上男性的第 3位癌症死因〔1〕。多种资料显示 ,随着我国人均寿命延长 ,PCa发病率逐渐上升 ,早期诊断 PCa对其治疗及预后有重要意义。目前应用的主要诊断方法有 : Prostate cancer (PCa) is one of the most common tumors in Europe and the United States. The incidence of PCa is the second most common cancer in the United States, accounting for 17% of the total in men, and the third leading cause of cancer death in men 55 and older [1 ]. A variety of data show that with the extension of life expectancy per capita in our country, the incidence of PCa gradually increased, early diagnosis of PCa for its treatment and prognosis of great significance. The main diagnostic methods currently used are: