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国外前列腺癌防治试验的数据指出:在PSA<4ng/ml及直肠指检正常的男性人群中,仍有15%的个体在前列腺穿刺中发现患有前列腺癌。在更低的PSA水平(PSA<2.5ng/ml)的人群中前列腺癌的肿瘤特性如何,
Data from the Prostate Cancer Prevention and Treatment Trial abroad indicate that 15% of men in PSA <4 ng / ml and those with normal digital rectal examination are found to have prostate cancer during prostate biopsy. Tumor characteristics of prostate cancer in populations with lower PSA levels (PSA <2.5 ng / ml)