儿童椎体嗜酸性肉芽肿的影像诊断(附8例分析)

目的：分析并比较儿童椎体嗜酸性肉芽肿的X线、CT及MRI的影像学表现，重点讨论MRI的影像特点。方法：对8例经病理证实的儿童椎体嗜酸性肉芽肿进行回顾性分析，所有病例均行X线检查，4例行CT检查。6例行MRI检查。2例同时行CT、MRI检查。结果：X线表现为椎体破坏呈楔形或扁平形。CT表现为椎体骨质呈不规则溶解破坏。MRI扫描T1WI呈低或等信号，T2WI呈高信号，图像信号不均匀。相邻椎间盘无破坏，MRI矢状面及冠状面扫描可见椎间盘向病变椎体侧膨胀。椎体周围伴有限局性软组织肿块，MRI横断面扫描呈均匀环带状，矢状面及冠状面呈套袖状，边界清晰，具有一定特征性。结论：MRI对于病变及其周围改变的显示要优于传统X线及CT，有助于椎体嗜酸性肉芽肿的诊断及鉴别诊断。

Imaging diagnosis of eosinophilic granuloma of the spine in children (analysis of 8 cases)

Objective:To analyze and compare the X-ray,CT and MRI features of children spinal eosinophilic granuloma (CSEG).The MRI findings were discussed emphatically.Methods:Histories of the8patients with CSEG proven by histologic examination were reviewed retrospectively.X-ray,CT and MRI were performed in8,4and6cases respectively and2cases were examined by CT and MRI together.Result:On X-ray film demonstrated that vertebral bodies destroyed by CSEG,appeared wedged or flattened.Computed tomography demonstrated irregular destruction of the vertebrae.The lesion was hypointense or isointense on T 1 WI ,hyperintensity on T 2 WI .The intensity was inhomogeneous on T 1 WI and T 2 WI.The adjacent intervetebral disks were not destroyed and bulge towards pathologic vertebrae in MRI saggital and coronal imaging.There was a homogeneous well-defined soft tissue mass surrounding the affected vertebral body on MRI axial images and showed oversleeved in sagittal and coronal images,this finding was considered as a relatively characteristic feature.Conclusion:MRI can show the pathologic vertebrae and the adjacent abnormalities more clearly than X-ray and CT,it is helpful in the diagnosis and differential diagnosis,but the final diagnosis must be based on pathology.