1·Though brain tumor stem cells are low proportion in tumor tissue, they are the key for maintaining malignance.
但其在肿瘤组织中所占的比例很低，却是肿瘤保持恶性特征的关键所在。
2·S100A1 may be a useful marker in judging degree of malignance of RCC.
S100A1可能成为判断肾细胞癌恶性程度的一项有用的指标。