Brain tumor historical perspective
Brain tumor Microchapters |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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.