椎管内硬膜外血管脂肪瘤MRI表现及临床病理对照观察

Comparative analysis of MRI findings and clinical pathology for spine epidural angiolipomas

中文关键词:  椎管内  硬膜外  血管脂肪瘤  磁共振成像  病理学

英文关键词:Intraspinal  Epidural  Angiolipomas  Magnetic resonance imaging  Pathology

中文摘要:

  【摘要】 目的：探讨椎管内硬膜外血管脂肪瘤的MRI特点，并观察ＭＲＩ表现与病理特点之间的对应关系。方法：回顾性分析2例椎管内硬膜外血管脂肪瘤患者的临床资料、MRI信号和形态特点，并与临床病理学（含细胞组成、异型性和免疫组化结果）对照。结果：血管脂肪瘤病理学上由纤细的血管和成熟的脂肪细胞两部分组成，肿瘤位于椎管内硬膜囊后方呈哑铃型，邻近椎间孔扩大，MRI信号由血管和脂肪所含比例决定，与脂肪瘤等其他椎管内硬膜外肿瘤相比，血管脂肪瘤T1WI为等或高信号，T2WI为高信号，脂肪抑制像序列信号增高或减低，增强扫描病灶有强化。结论：MRI能清楚显示血管脂肪瘤的大小、形态、信号特征及其与椎管邻近结构的关系，脂肪抑制序列及增强扫描具有较高的诊断价值。

英文摘要:

  【Abstract】 Objectives: To investigate the MRI features of spine epidural angioliomas and its association with clinical pathology. Methods: Clinical data and MRI findings of 2 patients with spine epidural angioliomas were analyzed retrospectively. The correlations between image findings and pathological results including cellular component, heteromorphism and immunohistochemical consequence were evaluated. Results: Angiolipomas were composed of tenuity vascular and mature adipocyte, which　located in spine epidural and showed dumbbell-shaped, and adjacent intervertebral foramen were evidenced enlarged. Compared with other tumors sited in spine epidural such as liparomphalus, the ratio of blood vessel and fat determined the MRI signals： isointense or hyperintense signals on T1WI, hyperintense signals on T2WI. The tumors′ signals increased or decreased on STIR, while increased in enhanced MRI. Conclusions: The size, morphology, MRI signal of angiolipomas and the association with the adjacent structure can be clearly displayed on MRI. STIR and enhanced MRI are valuable for distinguishing from other disorders．