目的 总结乳腺纤维腺瘤临床 特点、MRI征象及其与乳腺癌鉴别诊断 要点。方法 回顾性分析我院收治的44 例经手术或穿刺检查证实为乳腺纤维瘤 (n=29)及乳腺癌(n=15)患者的MRI影像学 检查资料，总结乳腺纤维瘤临床特点，分 析及与乳腺癌MRI征象差异。结果 本组 15例(19个病灶)乳腺癌均经MRI检出，检 出率为100.0%；29例(38个)纤维腺瘤MRI 检出27例，2例误诊为乳腺癌，检出率为 93.10%。结论 清晰边界，包膜完整，无 强化分隔，内部信号均匀为乳腺纤维腺瘤 MRI征象，当乳腺肿瘤MRI形态与表现功能 不符时，应注意鉴别。

Objective To summarize the clinical characteristics and MRI findings of breast fibroadenomas and differential diagnosis of breast cancer. Methods The MRI imaging data of 44 patients with breast fibroadenomas (n=29) and breast cancer (n=15) confirmed by surgery or biopsy were analyzed retrospectively. The clinical characteristics of breast fibroadenomas were summarized. The differences in MRI findings between breast fibroadenomas and breast cancer were analyzed. Results In this study, 15 cases (19 lesions) of breast cancer were detected by MRI and the detection rate was 100.0%. Of the 29 cases (38 lesions) of fibroadenomas, MRI detected 27 cases and 2 cases were misdiagnosed as breast cancer. The detection rate was 93.10%. Conclusion Clear boundaries, complete capsule, no enhanced separation, internal homogrnrous signal are MRI signs of breast fibroadenomas. When MRI findings of breast tumors does not match the performance function, they should be carefully identified.