<unk> s are generally benign WHO grade I tumors; the presence of anaplastic changes in the glial component is considered to represent WHO grade III (anaplastic<unk> . Criteria for WHO grade II have been suggested, but are not established. Malignant transformation of spinal<unk>  has been seen in only a select few cases. Poor prognostic factors for adults with<unk> s include older age at diagnosis, male sex, and malignant histologic features.
Ganglioglioma
Paraganglioma
Neurothekeoma
Subependymoma
Central neurocytoma
Schwannoma
Pilocytic astrocytoma
Ependymoma