Approximately 50% of all tumors occurring within the intracranial cavity fall under the heading "glioma," a heterogeneous collection of neoplasms unified by the fact that they arise from glial tissues that includes all, immature and mature neuroectodermal tumors.

The word 'Glioma', is derived from 'Glue', a greek word for a binding substance.

They include the following and each of them is discussed individually elsewhere.

Astrocytomas **

Oligodendrogliomas, mixed gliomas, & Gliomas of unknown origin**

Ependymomas**

Neuronal And Glioneuronal Tumors**