Ependymoma

Pronunciation

Definition 1

A type of brain tumor that begins in cells lining the spinal cord central canal (fluid-filled space down the center) or the ventricles (fluid-filled spaces of the brain). Ependymomas may also form in the choroid plexus (tissue in the ventricles that makes cerebrospinal fluid). Also called ependymal tumor. (NCI Dictionary)

Definition 2

A WHO grade II, slow growing tumor of children and young adults, usually located intraventricularly. It is the most common ependymal neoplasm. It often causes clinical symptoms by blocking cerebrospinal fluid pathways. Key histological features include perivascular pseudorosettes and ependymal rosettes. (WHO) (NCI Thesaurus)

Definition 3

A neoplasm of ependymal origin, for which the malignancy status has not been established. (NCI Thesaurus/CDISC)

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