血清唾液酸（SA）是一种肿瘤标记物，在恶性肿瘤，尤其是肺癌患者的血清中含量明显增高。为探讨血清SA含量测定在肺癌诊断中的应用价值，我们应用单一试剂化学比色法测定血清SA含量，探讨SA在肺癌患者诊断中的意义。1材料与方法1．1研究对象健康对照组128例，男60例，女68例； Serum sialic acid (SA) is a tumor marker that is significantly elevated in the serum of malignancies, especially lung cancer patients. To explore the value of serum SA determination in the diagnosis of lung cancer, we used a single reagent chemical colorimetric method to determine the serum SA content, to explore the significance of SA in the diagnosis of lung cancer. 1Materials and methods 1.1 Research subjects Healthy control group 128 patients, 60 males and 68 females;