B型超声诊断原发性胆囊癌假阳性、假阴性分析

Analysis of False Positive and False Negative with Primary Gallbladder Carcinoma by B-ultrasonography

目的 分析胆囊癌B超检查中产生假阳性、假阴性的原因 ,并对如何提高B超诊断胆囊癌的准确性作了简要说明。方法 按胆囊癌常规检查方法。结果 36例胆囊癌B超检查产生假阳性 1例、假阴性 4例。结论 胆囊内胆汁沉积或凝血块等形成的不规则的强回声光团 ,易误诊为胆囊癌而出现假阳性 ;胆囊内大量结石掩盖肿物回声或胆囊癌占据整个胆囊腔 ,没有胆汁作透声窗时易误诊为慢性萎缩性胆囊炎 ,出现假阴性而漏诊。

The reason of false positive and false negative in primary gallbladder carcinoma diagnosed by B-ultrasonography was analysed,and how to improve the rate of accuracy of primary gallbladder carcinoma by B-ultrasonogrphy was discussed in this article.Methods The usual methods was used in gallbladder examination.Results 1 false positive and 4 false negative were made in 36 cases.Conclusion The major cause of misdiagnosis made by B-ultrasonogrphy could be caused by the follows:1) Deposited bile or condensed blood block in gallbladder forms irregular solid mass echoes which is easy to be misdiagnosed as gallbladder carcinoma.2)When the mount of stones cover the echoes of cancer,it could cause false negative.3)When the cancer occupys the whole gallbladder carity,it could be misdiagnosed as withering gallbladder cholecystitis.