Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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MRI Features of Spinal Epidural Angiolipomas

  • Hu, Su (Department of Radiology, The First Affiliated Hospital of Soochow University) ;
  • Hu, Chun-Hong (Department of Radiology, The First Affiliated Hospital of Soochow University) ;
  • Hu, Xiao-Yun (Department of Radiology, Wuxi People's Hospital Affiliated to Nanjing Medical University) ;
  • Wang, Xi-Ming (Department of Radiology, The First Affiliated Hospital of Soochow University) ;
  • Dai, Hui (Department of Radiology, The First Affiliated Hospital of Soochow University) ;
  • Fang, Xiang-Ming (Department of Radiology, Wuxi People's Hospital Affiliated to Nanjing Medical University) ;
  • Cui, Lei (Department of Radiology, The Second Affiliated Hospital of Nantong University)
  • Received : 2012.10.12
  • Accepted : 2013.06.11
  • Published : 2013.09.01
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Abstract

Objective: To describe the MRI findings in ten patients of spinal epidural angiolipoma for differentiated diagnosis presurgery. Materials and Methods: Ten surgically proved cases of spinal epidural angiolipomas were retrospectively reviewed, and the lesion was classified according to the MR findings. Results: Ten tumors were located in the superior (n = 4), middle (n = 2), or inferior (n = 4) thoracic level. The mass, with the spindle shape, was located in the posterior epidural space and extended parallel to the long axis of the spine. All lesions contained a fat and vascular element. The vascular content, correlating with the presence of hypointense regions on T1-weighted imaging (T1WI) and hyperintense signals on T2-weighted imaging, had marked enhancement. However, there were no flow void signs on MR images. All tumors were divided into two types based on the MR features. In type 1 (n = 3), the mass was predominantly composed of lipomatous tissue (> 50%) and contained only a few small angiomatous regions, which had a trabeculated or mottled appear. In type 2 (n = 7), the mass, however, was predominantly composed of vascular components (> 50%), which presented as large foci in the center of the mass. Conclusion: Most spinal epidural angiolipomas exhibit hyperintensity on T1WI while the hypointense region on the noncontrast T1WI indicates to be vascular, which manifests an obvious enhancement with gadolinium administration.

Keywords

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