乳腺非肿块型强化病变性质的MRI分析

MRI analysis in the diagnosis of breast diseases presented as non-mass like enhancement(NMLE)

目的探讨乳腺非肿块型强化病变的MRI影像学特点。方法回顾性分析54例有病理结果的非肿块病灶的MRI主要影像特征。结果病理结果 19例为恶性,35例为良性。平扫病灶的形态和信号特征不明确。增强扫描:恶性组,病灶分布呈节段性和区域性不均匀强化的占47.3%(9/19);良性组,病灶呈网状或点簇状均匀性强化的占28.6%(10/35)。MRI诊断乳腺非肿块样病变的敏感度、特异度分别为90.7%、61.4%。结论 MRI对乳腺非肿块型强化病变具有较高的诊断价值,结合其形态学特征及DWI有助于非肿块样强化病变的鉴别诊断。

Objective To explore the MRI image manifestations of breast diseases presented as non-mass like enhancement（NMLE）. Methods 5d cases presented as NMLE lesions which confirmed by pathological examination were analyzed retrospectively. All the pathologic results and imaging features were assessed accordingly. Results Among the 54 cases of NMLE, 19 cases were malignant tumors and 35 cases were benign masses. The morphological features and MRI signal characteristics of these lesions are not in accordance with those in non-enhanced MRI scan. After injecting the contrast agent, some lesions showed different tissue enhancement modes. In malignant group, 9/19 cases showed segmental and regional inhomogeneous enhancement which accounting for 47.3% ; while in benign group, assess with focal net-like or point clusters homogeneous enhancement accounted for 28.6% （10/35）. The sensitivity and specificity of MR diagnostic is 90.7% and 61.4% respectively. Conclusions MRI examination is of great value in NMLE diagnosis in female breast diseases, com- bination of morphological characteristics and DWI are helpful in differential diagnosis.