Studies in mice indicate some types of brain cancers may be initiated by adult stem cells predisposed to form tumors, according to a study in Cancer Cell, and the finding may help explain why such tumors are hard to cure by surgery and radiation therapy. The team author said the gene-engineered mice developed malignant astrocytoma, one of the most common types of brain tumors in adults, and the finding may lead to a better understanding of how these cancers originate and develop.

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