ependymoma


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ependymoma

[e‚pen·də′mō·mə]
(medicine)
A tumor of the central nervous system whose essential portion consists of cells derived from and resembling ependymal cells. Also known as medulloepithelioma.
References in periodicals archive ?
Table 1: Focal spinal cord lesions in children Neoplastic Non-neoplastic Glial tumors: Demyelinating disease: Astrocytoma, ependymoma ADEM, MS, transverse myelitis Non-glial tumors: Vascular lesions: Hemangioblastoma, metastases, Cavernoma, AV fistula, ischemia PNET, germ cell tumor, melanoma Others: Syringohydromyelia Table 2: Differentiation between Astrocytoma and Ependymoma Astrocytoma Ependymoma Age group Pediatric Adult Location Eccentric Central Morphology Ill-defined Well-circumscribed Enhancement Patchy, irregular Focal, intense homogenous Hemorrhage/ Uncommon Common calcification Conus or filum No Yes (Myxopapillary)
Elevated concentrations were observed in meningioma (3/5, glioma (1/5) and ependymoma (1/1).
3,4) The tumor may also contain perivascular pseudorosettes such as those seen in ependymoma, and some tumor cells can be arranged in straight lines.
In intramedullary tumours, astrocytoma was found in 2 patients and ependymoma was found in 2 patients.
In this review, intraocular astrocytoma will supersede the popular but less precise term intraocular glioma because intraocular oligodendroglioma and ependymoma have been reported.
Primary tumors are usually glial-astrocytoma in children and ependymoma in adults.
Fraser's schoolmate Joseph was diagnosed with a rare ependymoma malignant brain tumor in 2000, at the age of two.
87) Stafford SL, Pollock BE, Foote RL et al: Stereotactic radiosurgery for recurrent ependymoma.
of Cases Acoustic schwannoma 42 Ependymoma 1 Meningioma 6 Epidermoid 4 Arachnoid cyst 5 Lipoma 2 Vertebrobasilar dolichoectasia 2 Figure 2.
Furthermore, the presence of ovarian tumors containing an uncommon tissue unrelated to normal embryogenesis (eg, ependymoma (71) and nephroblastoma (14)) does not always imply a germ cell origin, as they may originate from totipotent stem cells from the same tumor (so-called neometaplasia).
The differential considerations for both studies included ependymoma, subependymoma, neurocytoma, giant cell astrocytoma, and metastasis.