9383/1 Subependymal astrocytoma, NOS



Definitions

Tumours of the central nervous system
ICD-O-3 topography code: C70, C71 and C72

Subependymoma is a benign, slowly growing neoplasm (WHO grade I) which is typically attached to a ventricular wall. The fourth and the lateral ventricles are most frequently affected. It is composed of glial tumor cell clusters embedded in an abundant fibrillary matrix with frequent microcystic change. Some lesions have the histological features of both subependymoma and ependymoma. Subependymomas are often detected incidentally and have a very favorable prognosis 1
 
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



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