Classification- Gliomas
- Meningiomas
- Pituitary adenomas
- Nerve sheath tumors
Grading
- Low-grade
- WHO grade II
- Well-differentiated (not anaplastic)
- High-grade
- WHO grade III-IV
- Undifferentiated (anaplastic)
Gliomas
- Ependymomas
- Ependyma is the thin epithelial membrane lining the ventricular system of the brain and the spinal cord
- Common location of intracranial ependymoma is the fourth ventricle
- Astrocytomas
- Slow growing astrocytoma (grade I)
- Slow growing astrocytoma (grade II)
- Anaplastic astrocytoma (grade III)
- Glioblastoma multiforme (grade IV)
- May form by progression from lower grades (10%)
- Oligodendrogliomas
- Mixed gliomas
- Such as oligoastrocytomas
Glial cell types
- Astrocytes
- Oligodendrocytes
- Ependymal cells
- Radial glia
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