研究设计。回顾性研究20例因骶骨脊索瘤和软骨肉瘤行肿瘤整块切除术的患者。
Study Design. Retrospective study of 20 consecutive patients who underwent en bloc tumor excision of sacral chordomas and chondrosarcomas.
相反原发性上颌骨恶性肿瘤则呈浸润性生长，骨质不规则破坏，大量瘤骨或瘤软骨形成、骨膜反应和软组织肿块等。
On the contrary, primary malignant maxillary tumor showed invasive growth, irregular bony destruction with massive bony or chondral tumor, periosteal reaction and soft tissue mass.
本病与发生于颅底的脊索瘤和软骨源性肿瘤不易鉴别，组化染色与电镜检查对鉴别诊断有帮助。
Destruction of spheno-occipital bone can be found in roentgenogram. It is difficult to distinguish chondroid chord?oma from chordoma and chondrogenic tumors which occur in this region.
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