Primary brain tumors are those that arise within the brain itself, unlike metastatic tumors that travel to the brain from a distant site. The most common types of primary brain tumors in adults are gliomas, glioblastomas, and lymphomas.

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Gliomas are a family of tumors comprising primarily of astrocytomas and oligodendrogliomas, the most aggressive primary brain tumor being the glioblastoma (GBM). These tumors are the most common primary brain tumors in adults.


The most commonly diagnosed primary malignant brain tumor of adults is the glioblastoma multiforme (GBM).


Lymphomas, also referred to as central nervous system lymphoma or primary central nervous system lymphoma (PCNSL), is a form of Non-Hodgkin's Lymphoma.

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