Department of Radiology, Cancer Center, Fudan University, Shanghai, China.
J Magn Reson Imaging. 2011 Jun;33(6):1369-74. doi: 10.1002/jmri.22464.
To investigate the morphological features of nonpuerperal mastitis on magnetic resonance imaging (MRI).
MRI results of 27 patients diagnosed with nonpuerperal mastitis were retrospectively analyzed according to the Breast Imaging Reporting and Data System (BI-RADS).
According to the enhanced MRI results, 22 cases presented as nonmass-like enhancements and five cases presented as masses. For the 22 nonmass-like enhancement lesions, one case showed as a homogeneous enhancement and 21 cases showed as heterogeneous enhancements. In the 21 heterogeneous enhancement cases, 13 contained lesions of rim-like enhancement. With regard to the number of lesions with rim-like enhancement, 11 presented as multiple and two as single. In the five mass lesions, three presented as rim enhancements. Indications of rim or rim-like enhancement accounted for 59% (16/27) of all cases. For the 16 cases that presented with signs of rim or rim-like enhancement, the central hypointensity area surrounded by enhanced rim or rim-like entity showed as hyperintensity in 14 cases and hypointensity or heterointensity in two cases on T2-weighted imaging.
On contrast-enhanced MRI, most nonpuerperal mastitis presented as nonmass-like lesion with heterogeneous signal intensity. The observation of signs of rim or rim-like enhancement on contrast-enhanced MRI with central hypointensity areas showing as hyperintensity on T2-weighted imaging is suggestive of the possibility of nonpuerperal mastitis.
探讨非哺乳期乳腺炎的磁共振成像（MRI）形态学特征。
回顾性分析 27 例经病理证实的非哺乳期乳腺炎患者的 MRI 资料，均按照乳腺影像报告和数据系统（BI-RADS）进行分类。
根据增强 MRI 结果，22 例表现为非肿块样强化，5 例表现为肿块。22 例非肿块样强化病变中，1 例呈均匀强化，21 例呈不均匀强化。21 例不均匀强化中，13 例包含边缘样强化病灶。边缘样强化病灶的数量为 11 个多发，2 个单发。5 个肿块中，3 个呈边缘强化。边缘或边缘样强化征象占所有病例的 59%（16/27）。在 16 例有边缘或边缘样强化征象的病例中，14 例中央低信号区周围增强的边缘或边缘样实质呈高信号，2 例呈低信号或混杂信号。
在增强 MRI 上，大多数非哺乳期乳腺炎表现为信号不均匀的非肿块样病变。在 T2 加权成像上中央低信号区周围呈高信号的增强边缘或边缘样征象提示非哺乳期乳腺炎的可能性。
