PMC3463142_01
Preoperative magnetic resonance images of the thoracic spine. Sagittal (a) and axial (b) T2-weighted images show intramedullary hyperintensity and swelling of the spinal cord extending from the level of T5 to T7. Sagittal (c) and axial (d) T1-weighted MR images show faint and partial Gadolinium enhancement. Findings of flow void or dilated pial venous plexus are not observed. The spinal cord is rotated approximately 45  to the right in the axial section (e)
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F1
Magnetic resonance imaging (MRI) showed an intramedullary T2 hyperintensity and swelling of the spinal cord extending from the level of T5 to T7 [Figure 1].
Intraoperative photograph showing the spinal cord rotating to the right. There are no dilated or tortuous vessels
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F2
No dilated or tortuous vessels suggestive of vascular malformation were observed on the surface of the spinal cord or the dural sac [Figure 2].
Photomicrographs of a biopsy specimen showing an increased number of small hyalinized vessels (a, b), gliosis (b), vascular thrombosis (c), and hemosiderin deposition (d). Neither tumor cells nor signs of active inflammation are observed. EVG stain, x100 (a); H and E, x200 (b, c) and 400 (d)
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F3
Neither tumor cells nor signs of active inflammation were observed [Figure 3].
Postoperative magnetic resonance images of the thoracic spine. Sagittal (a) and axial (c) T2-weighted MR images, and sagittal (b) T1-weighted MR images show disappearance of the intramedullary T2 hyperintensity and contrast enhancement
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F4
One week-postoperative MRI showed a marked decrease of the T2 hyperintensity area, spinal cord swelling and lesion enhancement [Figure 4].