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【单选题】
乳腺癌是女性最常见的恶性肿瘤之一,近年来虽然在早期诊断、早期治疗方面有些进展,但目前尚缺乏用于其早期诊断的高灵敏性、高特异性的标志物。关于CA549在乳腺癌中的临床应用,错误的是()
A.
CA549和CAl5-3是来自相同复合物分子中的不同抗原决定簇,因此它和CAl5-3一样作为乳腺癌普查的指标
B.
妊娠妇女和良性乳腺瘤、肝病患者CA549略微升高
C.
CA549对于乳腺癌的诊断有很高的特异性,阳性预测值达0.93
D.
卵巢癌、前列腺癌、肺癌患者CA549也可升高
E.
CA549也是乳腺癌的标志物,但在肿瘤早期阳性率较低
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