Fig 2 Huge giant-cell tumor of sacrum. Involving S1-S4, the spine column became oblique.图2：骶骨巨细胞瘤，侵犯骶1-骶4，造成脊柱向左侧倾斜，利用文中叙述的前后联合入路，肿瘤刮除，局部置管持续化疗.