Methods:Radioimmunoassay and immunoradiometricassay were adopted to detect CEA,CA19-9 and CA50 in venous serum of 35 elderly patients with cholangiocarcinoma and 31 cases of benign bile duct disease.

• 方法:采用放射免疫法和免疫放射法对35例老年胆管癌患者和31例胆管良性疾病患者静脉血清中CEA、CA19-9和CA50进行测定。