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原发性肝癌是我国常见恶性肿瘤之一，每年有20余万患者死于此病。血清AFP在大多数肝癌患者均有不同程度的升高，AFP是一种胚胎性蛋白质（72Kd的1球蛋白），其生物学功能目前尚不明确。在胚胎期，胎儿的肝脏，卵黄囊及胃肠道系统均可合成AFP。AFP在胎儿出生12周后迅速降至正常范
Primary liver cancer is one of the common malignant tumors in our country. More than 200,000 patients die from this disease every year. Serum AFP is elevated to varying degrees in most patients with hepatocellular carcinoma. AFP is an embryonic protein (72 kD 1-globulin) whose biological function is not yet clear. In the embryonic period, fetal liver, yolk sac and gastrointestinal system can synthesize AFP. AFP dropped rapidly to normal range 12 weeks after birth