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Types of Brain Cancer

The World Health Organization (WHO) has nine categories of primary brain tumors, which are based on the types of cells in which the tumors originate. Glial cells, which are responsible for crucial structural support for the brain's nerve cells, are the core component of gliomas, which are primary brain tumors.
Infiltrative astrocytoma and glioblastoma multiforme (GBM) account for nearly 85% of all brain tumors, with the remainder spread among the other seven types.

Tumor Type

Tumor Type Cell Origin

Infiltrative astrocytoma

Astrocytes

Pilocytic astrocytoma

Astrocytes

Oligodendroglioma

Oligodendrocytes

Mixed oligoastrocytoma

Oligodendocytes and astrocytes

Glioblastoma multiforme (GBM)

Astrocytes and other brain cell types (astroblasts, spongioblasts)

Ependymoma

Ependymocytes

Medulloblastoma

Primitive neural cell

Meningioma

Meninges

Other

..

Tumor grade: All gliomas, except GBM, range from well-differentiated tumors (low grade) to anaplastic, that are completely chaotic, undifferentiated (high grade). High-grade tumors are more aggressive and are associated with lower survival rates. In terms of surviving the disease, the grade of the tumor is the most important feature.

Primary Tumors

A primary brain tumor usually develops through a complex series of molecular and cellular mutations and may take years to acquire enough mass to cause symptoms that bring the disease to a person's and/or a physician's attention.
The most prevalent type of brain tumor in children is an astrocytoma, which develops in the brainstem, cerebellum, white matter of the brain, or spinal cord.

1. brainstem glioma–originates in the medulla, pons, or midbrain
2. choroid plexus papilloma–originates in the ventricles
3. The membrane that lines the bentricles and central canal of the spine is where ependymoma begins.
4. glioblastoma multiforme–most common types in adults; originates in glial cells in the berebrum
5. medulloblastoma–second most common type in children; originates in the fourth cerebral ventricle and the cerebellum; often invades the meninges

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