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WHO Classification of Tumours
Ependymoma, NOS


A slowly growing brain tumor of children and young adults, derived from the ependymal lining of the cerebral ventricles. Clinical symptoms typically result from blocking cerebrospinal fluid pathways. Key histological features include perivascular pseudorosettes and ependymal rosettes
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Louis DN, Ohgaki H, Wiestler OD, Cavenee WK (Eds.)
WHO Classification of Tumours of the Central Nervous System.
4th Edition
International Agency for Research on Cancer: Lyon 2007