非骨化性纤维瘤的X线、CT诊断

目的：探讨分析非骨化性纤维瘤的X线（CR）、CT表现及病理学改变，以提高对该病的术前确诊率，减少不必要的手术。材料与方法：回顾性分析6例经手术病理证实的非骨化性纤维瘤X线（CR）、螺旋CT表现，并与手术、病理对照。结果：病变发生于股骨下端4例，胫骨上端2例。病变在X线片上表现为界限清晰的透亮区，呈偏心性生长，紧靠骨皮质内侧，外形呈卵圆形，长轴多与骨纵轴平行。部分可见骨嵴存在，其周围可见硬化带，无明显骨膜反应。在CT平扫片上可见病变对骨皮质、髓腔的侵犯范围，并可见硬化缘、骨嵴及分隔等，无坏死低密度区。瘤体非骨质部分CT值平均为63．3Hu。结论：非骨化性纤维瘤有典型的X线（CR）、CT表现，结合临床资料，术前能够确诊，可减少不必要的手术。

X-ray & CT Diagnosis of Nonossifying Fibronma

Purpose： To investigate the X - ray, CT demonstration and pathological changes of nonossifying fibroma, in order to increase the pre - operate diagnosis accuracy and to avoid unnecessary operation. Materials and Methods： We reviewed six nonossifying fibroma eases which were pathologieaUy confirmed after operation. The X - ray, CT demonstration and pathological changes were compared and analyzed. Results： Four cases had lesion in the distal femur and two cases had lesion in the proximal tibia. The Conventional radiograph indicated that there was a clearly marginated eccentric cortically based lueeney, which is ovoid in size and close to the medial cortex. The longitudinal axis of the lesion was parallel to that of the long bone. Ossification and a thin sclerotic margin was noted in some of the lesion, there was no associated periostitis. CT images showed the clear range of involvement of the bone cortex and marrow. Sclerotic margin, ossification and osseous separate and hypointensity were also seen. The mean intensity of the lesion beyond the osseous part was 63.3 Hu. Conclu- sion： Nonossifying fibroma has specific X - ray and CT demonstration and it could be diagnosed together with the clinical measurement. Unnecessary operation could be decreased.