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癌胚抗原 (ＣＥＡ)自 196 5年应用于临床以来已作为胃肠道肿瘤的诊断和判断预后的监测指标。ＣＥＡ的检测方法较多 ,但常用的有放射免疫法 (包括间接法、直接法 )、固相放免法和酶免疫法。ＣＥＡ在所有肿瘤中大肠癌的表达是最高的 ,但用上述检查方法大肠癌患者血清ＣＥＡ的阳性
Carcinoembryonic antigen (CEA) has been used as a monitoring indicator for the diagnosis and prognosis of gastrointestinal cancer since it was applied in clinical in 196 years. There are many CEA detection methods, but radioimmunoassay (including indirect method, direct method), solid-phase radioimmunoassay and enzyme immunoassay are commonly used. CEA has the highest expression of colorectal cancer in all tumors, but serum CEA is positive in patients with colorectal cancer using the above examination method.