【摘要】 目的 探讨胸腔积液患者胸水与血清的癌胚抗原(CEA)水平及其比值对良恶性胸腔积液的诊断价值。方法 采用放射免疫分析法分析88例胸腔积液患者胸水与血清CEA水平及比值，其中恶性胸腔积液患者30例，良性胸腔积液患者44例。结果 恶性组患者胸水与血清的CEA水平及其比值均明显高于良性组，两组差异有非常显著性(P<0.01)。结论 检测患者胸水与血清CEA水平及其比值有助于临床胸水性质的诊断。

    Liu Hui，Zhang Xianlan，Zhang Tiantuo

    Department of Respiratory Disease，The Third Affiliated Hospital of Sun Yet-Sen Medical University，Guangzhou510630.

    【Abstract】 Objective To study the clinical significance of tumor marker CEA in the differential diagnosis of pleural effusion.Methods 88serum and hydrothorax samples were collected from88in-patients with pleural effuˉsion.Among them，30patients were suffered from malignant pleural effusion and58patients with benign pleural effuˉsion.The concentration of CEA was determined by immunoradiometric assay.Results The positive rate of serum and hydrothorax CEA in malignant group were significantly higher than that in benign pleural effusion(P<0.01) ......