Gliosarcoma is a rare primary brain tumor that is composed of neoplastic glial cells mixed with a spindle cell sarcomatous element.

神经胶质肉瘤是一种少见的原发性脑肿瘤，由新生的神经胶质细胞和肉瘤样的梭形细胞混合组成。

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Glioblastoma is the most frequent primary brain tumor, and for which standard therapies have not significantly increased the survival of patients.

胶质母细胞瘤是最常见的原发性脑肿瘤，常规的治疗手段并没有显著增加病人的生存期。

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There is also a need to draw attention to the situation, the incidence of brain metastases rate increased rapidly, even more than a primary brain tumor.

还有一个情况需要引起人们注意，现在脑转移瘤的发病率上升迅速，甚至超过了原发性脑肿瘤。

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Meningiomas represent about one-third of all primary brain tumors and are most frequently found in middle-aged women, the American Brain Tumor Association's website states.

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