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Supratentorial ependymomas. Neuroradiological study.

Ependymoma is a rare tumour developed from ependymal cells and belonging to the group of neuroglial tumours. It may be located in any part of the central nervous system, but shows a preference for the ventricular cavities. Neuroradiology is not specific. CT shows a frequently large, calcified and cystic lesion of varied density and strongly contrast-enhanced. The signal emitted at MRI is often heterogeneous. Treatment consists of surgery combined with radiotherapy. Prognosis is poor owing to the difficulty of surgical excision and to the possibility of CSF grafts.