MRI对进展期胃癌术前分期的评价

Evaluation of Preoparative Staging in Advanced Gastric Cancer with MRI

本文分析了３４例进展期胃癌的术前ＭＲＩ分期结果，并与手术病理进行对比，探讨ＭＲ对胃癌术前分期的价值。结果表明：ＭＲＩ对Ｔ２、Ｔ３、Ｔ４期的诊断准确率分别为１７．８％、７７．３％、１００％，总准确率为７９．４％。若将Ｔ３、Ｔ４期共同合为一组，判断浆膜是否侵出，准确率达８８．２％。若根据胃癌发生部位不同，分析ＭＲＩ与病理分期结果一致性，则责门胃底癌的符合率最高。

MR imaging was preoperatively performed in 34 patients with advanced gastric cancer,and the images were analyzed and staged on the basis of the criteria proposed by MatsushitaM. The results were correlated with histopathologic findings to evaluate the use of MRI inthe preoperative staging of advanced gastric cancer. The diagnostic accuracy of MRI in de-terming T2,T3,T4 grades of tumors were 77.8%,77.3%,100% respectively. The overall ac-curacy was 79.4%. When grades T3and T4 tumors were regarded as one group,the diagnoticaccordance rate for determing the presence or absence of extraserosal invasion with MRI was88.2 %. When the concordance between MRI and histopathologic staging results was studiedaccording to the location of tumors, the accuracy in staging tumors located in gastric cardiaand fundus was the highest.