椎管内硬膜外血管脂肪瘤的MRI表现(附2例报道并文献复习)  

MRI Findings of Spinal Epidural Angiolipomas with Literature Review

作　　者：黄娟[1] 周诚[1] 

机构地区：[1]北京医院放射科,北京100730

出　　处：《中国医学影像学杂志》2015年第6期432-434,共3页Chinese Journal of Medical Imaging

摘　　要：目的探讨椎管内硬膜外血管脂肪瘤的MRI表现,提高对椎管内血管脂肪瘤的认识。资料与方法回顾性分析经手术病理证实的2例椎管内硬膜外血管脂肪瘤的MRI表现,并复习相关文献,依据MRI表现对其分型。结果 2例椎管内硬膜外血管脂肪瘤分别位于腰椎椎管内和下段胸椎椎管内,肿瘤均位于硬膜外,呈长条形或梭形,长轴与脊柱纵轴平行。2例肿瘤部分区域在T1WI及T2WI上均呈高信号,压脂序列上信号衰减,增强扫描后相应区域强化不明显;部分区域在T1WI上呈低信号,T2WI上呈高信号,压脂序列上信号无衰减,增强扫描后相应区域明显强化,故肿瘤在T1WI上呈高低混杂信号,T2WI上呈高信号,压脂序列上肿瘤部分区域信号衰减,增强扫描后不均匀明显强化。MRI表现分型,1例为I型,1例为III型;2例均为非浸润型。结论 MRI能清楚显示椎管内硬膜外血管脂肪瘤的大小、形态、信号特征以及与椎管邻近结构的关系,MRI分型可进一步提高对本病的认识,MRI是诊断本病的最佳影像学检查方法。Purpose To investigate the MRI findings and to improve the understanding of spinal epidural angiolipomas. Materials and Methods MRI findings were retrospectively analyzed in two cases of surgery and pathology proven spinal epidural angiolipomas. Relevant literatures were reviewed. Results Two cases of spinal epidural angiolipomas were located in the lumber and lower thoracic spinal canal. The tumors were elongated or spindle in shape within the epidural space, and parallel to the longitudinal axis. In both cases part of the tumors were hyperintense on T IWI and T2W1, attenuated on fat-saturated sequences with mild enhancement. Some areas were hypointenseon Tl Wl, hyperintenseon T2W1, unattenuated on fat-saturated sequences with apparent enhancement. Angiolipomas were classified according to the MRI features. One was type I and the other was type Ili. Both cases were non-infiltrative. Conclusion MRI shows the size, shape, MRI signals and the association with the adjacent structure of spinal epidural angiolipomas. The MRI classification is helpful for improving the understanding of the tumor. MRI is the best imaging modality to diagnose spinal epidural angiolipomas.

关 键 词：血管脂瘤 脊髓肿瘤 椎管硬膜外肿瘤 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R730.2[医药卫生—诊断学]