摘要:
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%,47.62%,68.18%及82.35%.而二种标志物中有一种出现阳性则分别提高到43.75%,71.43%,86.36%及100%.且二种标志物血清水平随Dukes分期的升高而升高,各期均有统计学意义.CEA,CA242在Dukes A,Dukes B,Dukes C及Dukes D期的相关系数分别为0.78,0.54,0.50及0.85.结论CA242是一种与CEA不相互依赖的,适用于大肠癌诊断,治疗及预后判断的新的肿瘤标志物.联合检测血清标志物CEA,CA242可提高大肠癌诊断的阳性率,同时对大肠癌的治疗,预后的判断给予有力的依据.