Con clu-sion CT scan is better demonstrated the edges and internal conditions of the tumor,and it allows differentiation of Chondromyxoid fibro ma,multifocal bone cyst,giant cell tumor of bone,chondroblastoma.

• 结论:CT扫描可清楚观察肿瘤的边缘及内部结构,可以很明显地与多囊性骨囊肿、巨细胞瘤及良性软骨母细胞瘤鉴别。