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目的:探讨血清标志物CEA,CA242在大肠癌的表达水平和诊断价值以及二种标志物的相关性。方法:应用放射免疫及免疫放射法检测76例大肠癌病人血清中CEA,CA242。结果:二种标志物与大肠癌癌瘤部位不相关,CEA,CA242的阳性率分别为56.58%,59.21%。CEA在Dukes A,Dukes B,Dukes C及Dukes D的阳性率分别为18.75%,42.86%,68.18%及94.12%。CA242在Dukes A,Dukes B,Dukes C及Dukes D的阳性率分别为37.50%,4