目的:对照分析乳腺MR误诊病例的影像学表现与病理,总结诊断经验。方法:2013年2月~2015年12月,医院MR诊断乳腺病144例,良性病灶130例,恶性病灶42例,采用ADC值判断良恶性、Fischer评分法、时间-信号强度、胆碱峰综合定性诊断。结果:恶性误诊为良性4例,恶性二维特征不明显,边缘光滑,无毛刺征,或模糊,节段性非肿块表现,ADC分别为1.352、1.258、1.389×10-3s/mm2,均高于恶性者可信区间,良性病变时间-信号强度曲线Ⅰ型3例、Ⅱ型1例,良性误诊为恶性,边缘欠光滑,ADC1.103×10-3s/mm2,Ⅱ型。结论:乳腺MR误诊病例影像学表现不典型,ADC、二维特征、时间-信号强度曲线特征相悖。 Objective: To analyze the imaging findings and pathology of breast misdiagnosed cases of breast and to summarize the experience of diagnosis. Methods: From February 2013 to December 2015, the hospital diagnosed 144 cases of breast disease by MR, 130 cases of benign lesions and 42 cases of malignant lesions. The ADC value was used to judge the benign and malignant, Fischer score, time-signal intensity, Qualitative diagnosis. Results: Malignant misdiagnosed as benign in 4 cases, malignant two-dimensional features were not obvious, the edge of smooth, no burr, or fuzzy, segmental non-mass manifestations, ADC were 1.352,1.258,1.389 × 10-3s / mm2, were higher than the malignant The confidence interval, benign lesion time - signal intensity curve type Ⅰ in 3 cases, type Ⅱ in 1 case, benign misdiagnosed as malignant, margin less smooth, ADC1.103 × 10-3s / mm2, Ⅱ type. CONCLUSION: The imaging findings of breast misdiagnosed cases are not typical. The characteristics of ADC, two-dimensional features and time-signal intensity curves are contrary to each other.