目的 探讨第二眼超声对磁共振成像（MRI）额外发现的乳腺影像报告和数据系统（BI-RADS） 4或5类乳腺病变的诊断价值。方法 回顾性研究了MRI额外检查到BI-RADS 4或5类乳腺病变（89个）的第二眼超声影像学特征及BI-RADS分类。结果 MRI检查额外发现的89个BI-RADS 4或5类乳腺病变,经第二眼超声检查可匹配病变79个,检出率为88.8%,其中恶性病变22个（27.8%）。超声可匹配乳腺病变中,边界和血流分布两项超声特征在良、恶性组之间差异具有统计学意义（P<0.05）。第二眼超声再评估的受试者工作特征（ROC）曲线下面积为0.800,诊断乳腺癌的准确率较高。结论 第二眼超声能有效检出MRI额外发现的乳腺BI-RADS 4或5类病变且具有较高的诊断价值。
Objective To investigate the diagnostic value of second-look ultrasound （SLU） for additional breast lesions of Breast Imaging Reporting and Data System （BI-RADS） category 4 or 5 detected by MRI. Methods A total of 89 suspicious lesions of BI-RADS category 4 or 5 detected additionally by magnetic resonance imaging （MRI） were retrospectively analyzed by SLU for ultrasound imaging features and BI-RADS category. Results Of the 89 additional lesions detected by MRI, 79 lesions were detected by SLU, and the detection rate was 88.8%, including 22 （27.8%） malignant lesions. There were statistically significant differences between benign and malignant groups in the boundary and blood flow distribution of mass （P<0.05）. The area under the receiver operating characteristic （ROC） curve of SLU re-evaluation was 0.800, indicating a high accuracy in diagnosing breast cancer. Conclusion SLU can effectively detect additional BI-RADS category 4 or 5 lesions by MRI and has a high diagnostic value.
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