摘要
目的:探讨囊性胸腺瘤的MRI特征,以提高其MRI诊断及鉴别诊断水平。方法:回顾性分析经组织病理学证实的17例囊性胸腺瘤的临床及MRI影像资料,其中男9例,女8例,年龄19~72岁,平均46岁。分析常规MRI特征(包括大小、形态、囊腔分隔、实性成分、包膜完整度、瘤周水肿等)及表观扩散系数(ADC)值。结果:组织病理学分型:A型胸腺瘤2例(11.8%),AB型胸腺瘤2例(11.8%),B1型胸腺瘤2例(11.8%),B2型胸腺瘤8例(47.0%),B3型胸腺瘤3例(17.6%)。肿瘤大小2.3~13.6 cm,平均7.1 cm;囊液呈T1WI低信号、T2WI高信号12例(70.6%),T1WI高信号、T2WI高信号5例(29.4%);囊壁或分隔均含有不同程度实性成分,其中单发附壁结节/肿块9例(52.9%),多发附壁结节/肿块5例(29.4%),弥漫性增厚伴结节/肿块3例(17.7%);肿瘤实性成分ADC平均值1.32×10-3mm2/s。结论:囊性胸腺瘤多为B2型胸腺瘤,肿瘤多伴有不同程度实性成分。MRI对囊性胸腺瘤的诊断及鉴别诊断具有重要价值。
Objective:To explore the clinical and MRI features of cystic thymomas and improve the MRI diagnosis and differential diagnosis ability.Methods:The clinical data and MRI images of 17 pathologically confirmed cystic thymomas patients(9 males and 8 females;age range:19~72 years old;mean age:46 years old)were reviewed retrospectively.Preoperative conventional MRI and DWI scans were performed in all patients.The conventional MRI features(tumor size,shape,septa,solid portions,capsule integrity,peritumoral edema,etc.)and ADC value were analyzed.Results:According to the histopathological results,there were 2 cases(11.8%)of type A thymomas,2 cases(11.8%)of type AB thymomas,2 cases(11.8%)of type B1 thymomas,8 cases(47.0%)of type B2 thymomas,3 cases(17.6%)of type B3 thymomas.The size of the tumors ranged from 2.3 cm to 13.6 cm,with an average size of 7.1 cm.The cystic component of the tumors showed hypo-intensity on T1WI and hyper-intensity on T2WI in 12 cases(70.6%),and hyper-intensity on T1WI and hyper-intensity on T2WI in 5 cases(29.4%).The cyst wall or septum of the tumors contained solid components to varying degrees,including single mural nodule or mass in 9 cases(52.9%),multiple mural nodules or masses in 5 cases(29.4%),and diffused thickening of cystic wall with nodules or masses in 3 cases(17.7%).The average ADC value of solid tumor portion was 1.32×10-3mm2/s.Conclusions:Cystic thymomas are usually type B2 thymomas and contain solid components to varying degrees.MRI plays an important role in the diagnosis of cystic thymomas.
作者
肖刚
胡玉川
段世军
闫卫强
李刚峰
崔光彬
XIAO Gang;HU Yu-chuan;DUAN Shi-jun(Department of Radiology&Functional and Molecular Imaging Key Lab of Shaanxi Province,Tangdu Hospital,the Military Medical University of PLA Airforce,Xi'an 710038,China)
出处
《放射学实践》
北大核心
2020年第2期165-169,共5页
Radiologic Practice
基金
陕西省社会发展科技攻关项目(NO.2016SF-211)
第四军医大学第二附属医院科技创新发展基金(NO.2017LCYJ004).
关键词
胸腺瘤
磁共振成像
表观扩散系数
诊断
鉴别
Thymoma
Magnetic resonance imaging
Apparent diffusion coefficient
Diagnosis,differential
作者简介
肖刚(1987-),男,湖北荆州人,硕士研究生,主治医师,主要从事纵隔肿瘤多模态MRI研究工作;通讯作者:崔光彬,E-mail:cgbtd@126.com
