涎腺肌上皮瘤MRI表现  

The MRI Findings of Myoepithelioma in Salivary Gland

作　　者：刘颖[1] 马隆佰[1] 郭文文[2] 

机构地区：[1]广西壮族自治区人民医院CT室,530021 [2]广西壮族自治区人民医院病理科,530021

出　　处：《临床放射学杂志》2016年第4期524-528,共5页Journal of Clinical Radiology

摘　　要：目的探讨涎腺肌上皮瘤的MRI表现。方法回顾性分析12例经病理证实的涎腺肌上皮瘤的MRI表现。结果病变位于大涎腺4例,小涎腺8例;10例有包膜,2例无包膜;T_1WI上7例呈均匀等信号,1例呈均匀低信号,4例呈不均匀等信号;T_2WI上10例呈稍高信号,2例呈高信号;12例信号不均,4例呈混杂磨玻璃样低信号,4例呈混杂网格状低信号,2例呈混杂网格状高信号,2例合并囊变。12例呈明显不均匀强化。病理结果:8例良性,4例恶性。12例见黏液样基质及玻璃样变。结论肌上皮瘤的MRI表现与其内细胞成分及黏液样基质、玻璃样变含量有关,特别是T_2WI中心云絮状或磨玻璃样稍低信号及云絮状强化较弱区,具有一定的特征性,有助于临床诊断及手术治疗。Objective To analyze the MRI findings of myoepithelioma in the salivary gland. Methods MRI and pathological findings of 12 patients with myoepithelioma proved by pathology were retrospectively analyzed. Results Total of 12 salivary myoepitheliomas,4 lesions located in major salivary glands,8 lesions located in minor salivary glands; 10 lesions with capsular structure,2 lesions without capsule; 7 cases were homogeneous isointense,1 case was homogeneous hypointense,4 cases were heterogeneous isointense on T1 weighted images; 10 cases were slightly hyperintense and 2 cases were hyperintense on T2 weighted images,12 cases were heterogeneous,4 cases with ground gross hypointense,4 cases with netted hypointense,2 cases with netted hyperintense,2 cases with cystic changes. 12 cases with inhomogeneous enhancement on contrast-enhanced T1 weighted images. Pathological findings in 12 cases： 8 cases were benign and 4 case were malignant. 12 cases with myxoid matrix and hyalinization. Conclusion MRI features of myoepithelioma depend on the content of cell components,myxoid matrix,and hyalinization,especially,the center of lesionappear cloudy and ground gross hypointense on T2 weighted images,cloudy hypointense on enhancement,it is helpful for clinical diagnosis and operation.

关 键 词：肌上皮瘤 涎腺肿瘤 病理学 磁共振成像 

分 类 号：R739.87[医药卫生—肿瘤]