The most common malignant primary bone tumors are osteosarcomas.
最常见的恶性原发性骨肿瘤是骨肉瘤。
The most common malignant primary bone tumors are osteosarcomas.
恶性唾液腺肿瘤并不是个常见的疾病。
Osteosarcomas strike just 900 Americans a year. Two-thirds of them are younger than 40.
每年约900名美国人患这种癌症，其中三分之二患者40岁以下。
There were 23 osteosarcomas, 6 Ewing sarcomas, 2 chondrosarcomas, and 2 invasive osteoblastomas.
骨肉瘤23例，尤文肉瘤6例，软骨肉瘤2例，侵袭性骨母细胞瘤2例。
GNAS mutations were not detected in any of the low-grade osteosarcomas from which informative DNA was extracted.
结果发现所有低级别骨肉瘤中提取的DNA均未发现GNAS突变。
Conclusion HIFU is an effective local therapy for osteosarcomas, and MRI can accurately evaluate the efficacy of HIFU.
结论HIFU是一种有效局部治疗骨肉瘤的方法，MRI能准确评估HIFU治疗骨肉瘤的疗效。
Primary cardiac osteosarcomas are rare, accounting for only 1% of all cardiac tumors, and they usually originate in the left atrium.
原发性心脏骨肉瘤罕见，只占心脏肿瘤的1%，通常源于左心房。
Method: 11 patients with the diagnosis of osteosarcomas of the extremities were treated with adjuvant chemotherapy and limb salvage surgery.
方法：对11例四肢骨肉瘤患者进行保肢治疗，其中11例进行了术前、后新辅助化疗。
Methods The expression of TAF and microvascular density count in 80 osteosarcomas were investigated by immunohistochemical staining and morphometric technique.
方法：应用免疫组化和形态计量方法，检测80例骨肉瘤TAF表达和肿瘤微血管密度。
Methods The expression of VEGF and intratumoral microvascular density(MVD) in 80 osteosarcomas and osteosarcoma cell OS-732 was detected by immunohistochemical staining.
方法应用免疫组化和形态计量方法，检测80例骨肉瘤VEGF表达、肿瘤微血管密度（MVD），以及OS-732血管生成相关因子的表达。
Our findings therefore support prior observations that GNAS mutations are highly specific for fibrous dysplasia and occur rarely, if ever, in parosteal and other low-grade osteosarcomas.
因此我们的研究与先前的研究一致，GNAS的突变在纤维性结构不良中有高度特异性，而在骨旁骨肉瘤和其它低级别骨肉瘤中即使有GNAS突变、也是很少的。
Our findings therefore support prior observations that GNAS mutations are highly specific for fibrous dysplasia and occur rarely, if ever, in parosteal and other low-grade osteosarcomas.
因此我们的研究与先前的研究一致，GNAS的突变在纤维性结构不良中有高度特异性，而在骨旁骨肉瘤和其它低级别骨肉瘤中即使有GNAS突变、也是很少的。
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