患者　右踝部疼痛 2年 ,有踝关节扭伤史。查体 :外踝部表面骨性隆起 ,压痛明显。ＣＴ检查 :右跟骨前段呈类圆形膨胀性骨质破坏 ,大小5 .5ｃｍ× 4.0ｃｍ× 3 .5ｃｍ ,其内正常骨小梁结构消失 ,可见斑片状、辐射状骨质硬化 (图 1) ,内外侧骨皮质向外膨胀 ,远端内侧及前缘骨质硬 The patient had 2 years of pain in the right ankle and had an ankle sprain history. Physical examination: Bony bulges on the surface of the lateral malleolus, with marked tenderness. CT examination showed that the anterior segment of the right calcaneum was a circular expansive bone destruction with a size of 5.5 cm × 4.0 cm × 3.5 cm, and the normal trabecular structure disappeared within it, showing patchy, radial bone sclerosis (fig. 1) The inner and outer cortical bones expand outwards, and the distal medial and anterior edge bones are hard