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目的:探讨MRI对小乳腺癌的诊断价值。方法:2008年6月至2009年6月间经临床怀疑为小乳腺癌(直径≤2 cm)而行MRI检查,MRI诊断结果按乳腺影像报告及数据系统(breast imaging reporting and data system,BI-RADS)分类为Ⅲ类、Ⅳ类及Ⅴ类者共62例。其中31例近期(1周内)接受了乳腺X线摄影检查(mammography,MG),并按BI-RADS分类法进行分类。所有病例均经病理学证实,比较MRI及MG两种检查方法对小乳腺癌的检出率、灵敏度、阳性预测值的差异。结果:所有62例乳腺小病灶中经病理证实为乳腺癌者50例,31例行MG检查的病例中小乳腺癌为21例,MRI对小乳腺癌的检出率、灵敏度均高于MG,分别为100%比85.7%和94.0%比61.9%(P<0.05)。结论:MRI对小乳腺癌的检出率和灵敏度优于MG。
Objective: To investigate the diagnostic value of MRI for small breast cancer. Methods: MRI was performed on suspected small breast cancer (diameter≤2 cm) from June 2008 to June 2009, and the diagnostic results of MRI were analyzed by breast imaging reporting and data system (BI- RADS) classified as Class III, Class IV and Class V, a total of 62 cases. 31 of them were mammography (MG) recently (within 1 week) and classified by BI-RADS classification. All cases were confirmed by pathology, MRI and MG compared the two detection methods for small breast cancer detection rate, sensitivity, positive predictive value difference. Results: All 62 cases of small breast lesions pathologically confirmed by 50 cases of breast cancer, 31 cases of small breast cancer cases in 21 cases, the detection rate of small breast cancer MRI, sensitivity were higher than MG, respectively 100% vs. 85.7% and 94.0% vs. 61.9% (P <0.05). Conclusion: The detection rate and sensitivity of MRI for small breast cancer is better than that of MG.