ICD-O 9383/1 | DiseasesDB 34807 | |
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A subependymoma is a type of brain tumor; specifically, it is a rare form of ependymal tumor.
The prognosis for a subependymoma is better than for most ependymal tumors, and is considered a grade I/IV 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.
Diagnosis
The diagnosis is based on tissue, e.g. a biopsy. Histologically subependymomas consistent of microcystic spaces and bland appearing cells without appreciable nuclear atypia or mitoses. The nuclei tend to form clusters.
References
Subependymoma Wikipedia(Text) CC BY-SA