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 ?
Recurrent medulloepithelioma of the ciliary body: immunohistochemical characteristics.
borrowed the term medulloepithelioma from the seminal work on the related brain tumor by Bailey and Cushing.
In the 1970s, Lorenz Zimmerman (5,6) proposed a system for classifying primary tumors of the ciliary epithelium, as well as the conceptual framework for understanding the cellular polymorphism of medulloepithelioma.
There is no population-based information on incidence or prevalence of medulloepithelioma.
At least 11 cases of medulloepithelioma have been reported in persons older than 20 years.
There are no known risk factors for intraocular medulloepithelioma.
The terms acquired medulloepithelioma or adult medulloepithelioma are contradictions based on the current concept of tumor development.
8,9,11) The differential diagnosis of an intraocular mass lesion is influenced by the age at presentation, since few tumors other than medulloepithelioma occur between 5 and 20 years of age.
Neuroepithelial tubules are also a feature of medulloepithelioma not found in retinoblastoma.
The designation teratoid medulloepithelioma applies when heteroplastic tissue is present.
There are no universally agreed-upon histologic criteria for malignant medulloepithelioma.
Cerebral medulloepithelioma with bone, cartilage, and striated muscle.