肉芽肿性乳腺炎的MRI表现

Menifestations of granulomatous mastitis on MR imaging

目的总结5例肉芽肿性乳腺炎核磁共振成像影像(MRI)表现。方法回顾性分析病理确诊肉芽肿性乳腺炎5例资料,总结病灶形态、T2加权(T2WI)脂肪抑制信号、弥散加权(DWI)信号、动态增强强化方式及时间-信号强度曲线(TIC)等MRI影像特征。结果 5例病灶均位于一个象限内,边缘模糊,呈不规则多结节形;有2例可见播散征,3例腋窝淋巴结增大。T2WI脂肪抑制为高信号,DWI为高信号,动态增强均表现为不均匀明显强化;其中,3例伴多发环形脓肿形成,时间-信号强度(TIC)曲线流出型1例,平台型3例,缓升型1例。结论肉芽肿性乳腺炎MRI有一定特征性,活检可提高术前诊断率。

Objective To summarize the menifestations of granulomatous mastitis on magnetic resonance（MR） imaging in 5 patients.Methods Data of MR imaging in 5 patients with granulo-matous mastitis were analyzed retrospectively.Results The granulomatous mastitis lesions of 5 cases located in one quadrant,which were with blured edge and irregular nodules.The disseminated sign was visible in 2 cases and enlargement of axillary lymph node was palpable in 3 cases.The higher fat suppression signal on T2WI and high signal on DWI were recorded.The lesions were unevenly enhanced.Type Ⅲ（time-signal intensity） curve was pictured in 1 case,type Ⅱ curve in 3 cases and type I curve in 1 case.Conclusion Granulomatous mastitis has certain characteristic features on MR imaging and biopsy can improve diagnosis rate before operation.