脊髓血管脂肪瘤：磁共振成像特征
Spinal angiolipomas: MR features.
作者信息
Provenzale J M, McLendon R E
机构信息
Department of Radiology, Duke University Medical Center, Durham, NC 27710, USA.
出版信息
AJNR Am J Neuroradiol. 1996 Apr;17(4):713-9.
PURPOSE
To determine the MR features of spinal angiolipomas and to compare these findings with their histologic appearance.
METHODS
The MR examinations of three patients with surgically proved angiolipomas were reviewed for tumor location and extent, signal characteristics, and pattern of contrast enhancement, and were then compared with the histologic findings.
RESULTS
Four tumors were found in the three patients, all located in the posterior epidural compartment, averaging about 2.5 vertebral bodies in length. On noncontrast T1-weighted images, all lesions were inhomogeneous and hypointense relative to epidural fat. Inhomogeneous enhancement was seen in three lesions on postcontrast T1-weighted images obtained with fat-saturation techniques. Angiolipomas were least conspicuous on T2-weighted images. A high vascular content correlated with the presence of large hypointense regions on T1-weighted images.
CONCLUSION
Spinal angiolipomas are typically hyperintense on noncontrast T-1-weighted images relative to other tumors. Angiolipomas that contain large hypointense foci on noncontrast T1-weighted images can be expected to have a high degree of vascularity.
目的
确定脊柱血管脂肪瘤的磁共振成像（MR）特征，并将这些发现与它们的组织学表现进行比较。
方法
回顾了3例经手术证实为血管脂肪瘤患者的MR检查结果，以观察肿瘤的位置和范围、信号特征及对比增强方式，然后与组织学结果进行比较。
结果
3例患者共发现4个肿瘤，均位于硬膜外后间隙，平均长度约为2.5个椎体。在非增强T1加权图像上，所有病变相对于硬膜外脂肪均呈不均匀低信号。在用脂肪抑制技术获得的增强后T1加权图像上，3个病变呈不均匀强化。血管脂肪瘤在T2加权图像上最不明显。高血管含量与T1加权图像上大的低信号区域的存在相关。
结论
相对于其他肿瘤，脊柱血管脂肪瘤在非增强T1加权图像上通常呈高信号。在非增强T1加权图像上含有大的低信号灶的血管脂肪瘤预计具有高度血管性。
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