medulloepithelioma


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medulloepithelioma

 [mĕ-dul″o-ep″ĭ-the″le-o´mah]
a brain tumor composed of primitive neuroepithelial cells lining the tubular spaces.

me·dul·lo·ep·i·the·li·o·ma

(med'yū-lō-ep'i-thē'lē-ō'mă),
A rare, primitive, rapidly growing intracranial neoplasm thought to originate from the cells of the embryonic medullary canal and hence included with ependymoblastomas by some neuropathologists; ganglion cells and astrocyte maturation have also been reported. Tumors that occur in the ciliary body are referred to as embryonal medulloepitheliomas.
[medullo- + epithelium + -oma, tumor]

medulloepithelioma

/me·dul·lo·epi·the·li·o·ma/ (-ep″ĭ-the-le-o´mah) a rare type of neuroepithelial tumor, usually in the brain or retina, composed of primitive neuroepithelial cells lining the tubular spaces.

medulloepithelioma

medulloepithelioma

A highly aggressive, undifferentiated primitive neuroepithelial tumour of small children (up to age 5), which may contain bone, cartilage, and skeletal muscle; it tends to metastasise extracranially.

Medulloepithelioma of the eye arises in the ciliary epithelium; it is known as diktyoma or embryonal medulloepithelioma.

medulloepithelioma

A highly malignant undifferentiated primitive neuroepithelial tumor of children that may contain bone, cartilage, skeletal muscle; it tends to metastasize extracranially; MEs of the eye arise in the ciliary epithelium, and are termed diktyomas

me·dul·lo·ep·i·the·li·o·ma

(mĕ-dŭl'ō-ep'i-thē'lē-ō'mă)
A rare, primitive, rapidly growing intracranial neoplasm thought to originate from the cells of the embryonic medullary canal.
[medullo- + epithelium + -oma, tumor]

medulloepithelioma

1. A rare eye tumour affecting the CILIARY BODY or RETINA. May be BENIGN or MALIGNANT. Also known as dictyoma.
2. A rare malignant tumour of the nervous system.

medulloepithelioma

a brain tumor composed of primitive neuroepithelial cells lining the tubular spaces.
References in periodicals archive ?
Key Words: Spectrum, glioma, meningioma, neurofibroma, medulloblastoma, medulloepithelioma, craniopharyngioma, paraganglioma.
Embryonal tumor with abundant neuropil and true rosettes (ETANTR), ependymoblastoma, and medulloepithelioma share molecular similarity and comprise a single clinicopathological entity.
An intraocular mass excision biopsy was performed, and the pathology demonstrated it was a ciliary body medulloepithelioma of the left eye.
Medulloepithelioma of the ciliary body: Ultrasonographic biomicroscopic findings.
Additionally, rhabdomyosarcoma, a small round blue cell tumor, has been reported to arise in a ciliary body medulloepithelioma.
Recurrent medulloepithelioma of the ciliary body: immunohistochemical characteristics.
Confusing names attached to intraocular medulloepithelioma in the past have hampered effective communication and probably delayed a logical system of classification for tumors of the ciliary epithelium.
118,119) These are typically pediatric tumors and include medulloblastoma, supratentorial "central" PNET, medulloepithelioma, ependymoblastoma, and atypical teratoid rhabdoid tumor (AT/RT).
A variety of melanotic brain tumors have been described in the literature, including ependymoma, choroid plexus papilloma and carcinoma, medulloblastoma, medulloepithelioma, schwannoma, meningioma, melanocytoma, and melanoma.
1-6] Differentiation into specific mesenchymal tissues, such as cartilage, bone, skeletal muscle, smooth muscle, or adipose tissue in these embryonal tumors, is rare and has been reported in a few cases of medulloblastoma,[7-12] a cerebral medulloepithelioma,[13] and a case of cerebral PNET.
Immunohistochemical properties of ocular adenomas, adenocarcinomas and medulloepitheliomas.
Peripheral PNETs include peripheral neuroepitheliomas, peripheral medulloepitheliomas, Askin' s tumors, and (the recently added) Ewing's sarcomas.