关键词: 脊柱, 肉瘤, Ewing, 体层摄影术,X线计算机, 磁共振成像, Spine, Sarcoma, Ewing’s, Tomography, X-ray computed , Magnetic resonance imaging

Abstract: Objective: To study the CT and MRI manifestations of Spinal Ewing’s sarcoma (ES). Methods: From January 2003 to October 2009, the imaging data of 7 cases with spinal ES confirmed by pathology were analyzed retrospectively. Results: The lesions involved cervical, thoracic and lumbar vertebra were in 3, 3 cases and 1 case respectively. CT examination showed that vertebral body and/or appendix osteolytic bone destruction were in 2 cases. Three cases were intra- and extra-spinal soft tissue mass. MRI examination showed that seven cases manifested as intra- and extra-spinal soft tissue mass. T1-weighted image showed low, equal or slightly high signal in 7cases. T2-weighted image showed uneven high signal and contrast image showed heterogeneous enhancement in 6 cases．Only one case had slightly high signal on T2-weighted image and homogeneous enhancement on contrast image. According to immunohistochemical results, CD99 in all cases were positive. Conclusions: Spinal ES should be considered in adolescent patients with aggressive osteolytic bone destruction of vertebrae and intra- and extra-spinal soft tissue mass. The final diagnosis of spinal ES depends on the pathologic and immunohistochemical determinations. CT and MRI should be accurately and synthetically used on spinal ES, which can give more information to diagnosis, treatments, evaluating curative effects and prognosis.