骨内脂肪瘤的X线、CT特征与病理分析

The X-ray and CT features and pathological characteristics of intraosseous lipoma

目的探讨骨内脂肪瘤的影像学特征及病理对照。方法回顾性分析病理证实的13例骨内脂肪瘤的X线平片和CT片征象并与病理对照。结果跟骨4例,髋臼2例,股骨2例,腓骨2例,髂骨1例,胫骨1例,脊椎1例;X线平片表现为边界清或不清的不规则形低密度区,其内可见条块状及斑片状钙质样密度影,边缘多伴硬化。CT表现为多形状脂肪密度区,CT值为-27～127 HU,伴有厚薄不一的连续或断续硬化边,其中10例病灶中央和(或)边缘可见小结节状钙化。结论骨内脂肪瘤以主要含有脂肪成分为共同特点,多伴钙化及硬化边;CT能对其作出正确的术前诊断,注意不同病理分期骨内脂肪瘤的影像学表现有所不同。

Objective To research imaging features of intraosseous lipoma and pathological characteristics. Methods Imaging features with the X-ray and CT features and pathological characteristics of 13 cases with intraosseous lipoma were retrospectively analyzed. Results Intraosseous lipomas were located in the calcaneus （4 cases）,the acetabulum （2 cases）,the femoral （2 cases）,the fibula （2 cases）,the ilium （1 case）,the tibia （1 case） and the spondyle （1 case）. All loci showed oval or irregular radiolucent area on X-ray film and adipose tissue area with thin or thick sclerotic rim on CT images. The fat attenuation values within the lesion were in the range of -27 to -127 HU. Focal intralesional calcifications in the center or margin within the intraosseous lipoma were present in 10 cases. Conclusion The intraosseous lipoma has common imaging features, which are mainly composed of fatty tissue, with thin or thick sclerotic rim. They could be diagnosed correctly before operation by using CT, especially are different imaging features in different pathological staging.