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目的 :研究前列腺特异抗原 (PSA)与前列腺增生腺体体积的关系及其在前列腺癌 (PCa)诊断中的价值。方法 :75例前列腺增生症 (BPH )患者根据其 PSA >或≤ 4μg/ L分为两组 ,另有 2 5例 PCa患者 ,术前用放射免疫法测定血清 PSA。所有患者经 B超测出前列腺体积 ,用 t检验和相关分析研究各组间的差异及相关性。结果 :PSA >4μg/ L的 BPH较之 PSA≤ 4μg/ L者 ,腺体体积显著增大且 PSA和 PSA密度 (PSAD)显著增高。整个BPH组 PSA和前列腺体积之间存在显著相关性 ,其中 PSA>4μg/ L 者却没有这种相关性。结论 :一部分 BPH由于腺体增大和其他干扰因素使 PSA增高 ,且 PSA与前列腺体积失去相关性 ,影响了 PSA和 PSAD的诊断准确性。
Objective: To study the relationship between prostate specific antigen (PSA) and the volume of benign prostatic hyperplasia (Gp) and its value in the diagnosis of prostate cancer (PCa). Methods: Seventy-five BPH patients were divided into two groups according to their PSA> 4μg / L, and another 25 patients with PCa. Serum PSA was measured by radioimmunoassay before operation. All patients were measured by B ultrasound prostate volume, t-test and correlation analysis of the differences between groups and correlation. Results: Compared with those with PSA ≤ 4 μg / L, the volume of glands increased significantly and the PSA and PSA density (PSAD) were significantly higher in BPH with PSA> 4μg / L. There was a significant correlation between PSA and prostate volume in the entire BPH group, with no association for PSA> 4 μg / L. CONCLUSIONS: A part of BPH increased PSA due to enlargement of gland and other interference factors, and the loss of correlation between PSA and prostate volume affected the diagnostic accuracy of PSA and PSAD.