骨旁脂肪瘤的影像学特征及诊断价值

目的：分析骨旁脂肪瘤的影像学表现特征，提高对该病的认识及术前影像诊断水平。方法：回顾性分析经病理证实的我院2例骨旁脂肪瘤的临床及影像学表现。结果：2．例骨旁脂肪瘤，男女各1例，分别位于右侧股骨上段、左侧胫骨中下段骨旁软组织内。X线表现为骨旁软组织内的透光肿块；CT、MRI表现为骨旁脂肪密度或脂肪信号、有包膜的椭圆形分叶状肿块，边界清楚；邻近骨皮质形成突向肿瘤内部的珊瑚礁状或树枝状骨性突起。结论：骨旁椭圆形脂肪性肿块，伴有骨皮质突向肿块内的珊瑚礁状、树枝状骨性突起为骨旁脂肪瘤的影像学特征，具有重要的诊断价值。

Imaging Characters and Diagnostic Value of Parosteal Lipoma

Objective： To analyze the imaging character and improve understanding and preoperative imaging diagnostic level of parosteal lipoma. Method： Two cases of pathologically proved parosteal lipoma were analyzed, and the image and clinical features were also reviewed. Results： Of 2 cases parosteal lipoma, men and women were each 1 one, One was located in the soft tissue of superior segment of right femur and one located in lower segment of left tibia respectively. The X-ray image showed the radiolucent parosteal phyma. The fat density oi＇ fat signal was shown on CT and MR1 image, and capsule oval lobulated phyma was also shown, the border of which was distinct. The coraline or arborization bony protuberance to the inner side of lipoma was formed by the adjacent cortical bone. Conclusions： It is the image feature of parosteal lipoma that the oval fatty phyma coupled with coraline or arborization bony protuberance to the inner side of lipoma originated in the bony cortex, which is of important diagnostic value.