Brain tumor historical perspective: Difference between revisions

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==Overview==
==Overview==
Brain tumors can be classified into two main categories: primary and secondary tumors. Primary tumors originate in astrocytes, oligodendrocytes and ependymal cells. Secondary tumors originate in malignant cancers located primarily in other organs. As of 1993, the World Health Oreganization classifies primary brain tumors as the most common.


==Historical Perspective==
==Historical Perspective==

Revision as of 16:02, 20 August 2015