多种人体肿瘤中均存在着癌胚抗原(CE-A)。自1965年Gold 和Fredman 首先从结肠腺癌和胎儿结肠粘膜组织浸液中分离出CEA 以来,不少学者对其性质、来源、血中浓度及与不同肿瘤的关系进行了深入研究,发现少数正常人血中可测出CEA,而大多数实体肿瘤病人血CEA 明显增高.近年来,国外研究重点放在测定各种分泌液中CEA 浓度、血清CEA 与肿瘤组织内CEA 含量的关系以及使用标记CEA 抗体进行肿瘤定位 Carcinoembryonic antigen (CE-A) is present in many human tumors. Since Gold and Fredman first isolated CEA from colon cancer and fetal colon mucosal effusions in 1965, many scholars have conducted in-depth studies on the nature, origin, blood concentration, and relationship with different tumors and found that a few are normal. CEA can be detected in human blood, but CEA in most solid tumor patients is significantly increased. In recent years, foreign research has focused on measuring CEA concentration in various secretions, the relationship between serum CEA and CEA content in tumor tissue, and using labeled CEA. Antibody for tumor localization