Primary CNS tumors can be broadly classified into several types based on their origin and behavior. The most common types include: - Gliomas, which originate from glial cells and include subtypes such as astrocytomas, oligodendrogliomas, and ependymomas. - Meningiomas, arising from the meninges, the protective layers surrounding the brain and spinal cord. - Medulloblastomas, which are highly malignant and often occur in children. - Pituitary adenomas, originating from the pituitary gland.
