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癌胚抗原(Carcinoembryonic Antigen以下简称CEA)是一种分泌到胃肠道粘膜细胞表面的糖蛋白,在胚胎期第3～6月出现。正常情况下,CEA在出生前即停止产生。如果机体发生了肿瘤,它又可以重新出现。由于不仅良、恶性肿瘤可导致CEA水平升高。胆道阻塞、酒精性肝炎、长期大量抽烟等也可以引起,所以它还不能作为癌症的独特标志物。然而,它对观察癌症疗效却非常有用,因为若治疗有效,1个月内CEA血清水平(由放射免疫法测定)便可降至正常。一、目的:观察癌症疗效。
Carcinoembryonic antigen (hereinafter abbreviated as CEA) is a glycoprotein secreted on the surface of the gastrointestinal mucosal cells and occurs in the third to sixth months of the embryonic period. Under normal circumstances, CEA ceases to be produced before birth. If the body has a tumor, it can reappear. Because not only benign and malignant tumors can cause elevated CEA levels. Biliary obstruction, alcoholic hepatitis, long-term smoking, etc. can also be caused, so it can not be used as a unique marker of cancer. However, it is very useful for observing the efficacy of cancer, because if the treatment is effective, CEA serum levels (determined by radioimmunoassay) can be reduced to normal within one month. Objective: To observe the efficacy of cancer.