Ependymoma The presence of an ependymoma of the central nervous system. UMLS:C0014474 NCIT:C3017 human_phenotype HP:0002888 According to MPATH, ependymomas are neoplasms derived from the ependymal cells lining the ventricles and aqueduct of the brain and the central canal of the spinal cord and may be malignant or benign. MSH:D004806 SNOMEDCT_US:57706008 http://www.case.edu/EpSO.owl#Ependymoma SNOMEDCT_US:443643007 glioma