A<unk>  is a type of brain tumor; specifically, it is a rare form of ependymal tumor. They are usually in middle aged people. Earlier, they were called subependymal astrocytomas. The prognosis for a<unk>  is better than for most ependymal tumors, and it is considered a grade I tumor in the World Health Organization (WHO) classification. They are classically found within the fourth ventricle, typically have a well demarcated interface to normal tissue and do not usually extend into the brain parenchyma, like ependymomas often do.
Subependymoma
Neurothekeoma
Central neurocytoma
Subependymal giant cell astrocytoma
Ependymoma
Ganglioglioma
Pinealoma
Frontal horn cyst