Definition: A brain tumor that originates from the brain itself, or from the sheaths that cover it. Examples of primary brain tumors include meningioma, oligodendroglioma and astrocytoma, among others.
What Is a Primary Brain Tumor?
From Jose Vega M.D., Ph.D., for About.com
Updated: October 30, 2008
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
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