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ＰＳＡ（前列腺特异抗原）在前列腺癌诊断、疗效观察及预后等方面的价值已得到广泛重视，但在放疗中的应用研究鲜见报导，本文拟就此方面作一综述。
The value of PSA (Prostate Specific Antigen) in the diagnosis, efficacy and prognosis of prostate cancer has received extensive attention. However, there are few reports on the application of PSA in prostate cancer. This article is intended to summarize this aspect.